Title: Rename "pattern" to "path" in YAML data_files configs
State: closed

To make it easier to understand for users.

They can use "path" to specify a single path, 
or "paths" to use a list of paths.


Glob patterns are still supported though


Comments: _The documentation is not available anymore as the PR was closed or merged._<details>
<summary>Show benchmarks</summary>

PyArrow==8.0.0

<details>
<summary>Show updated benchmarks!</summary>

### Benchmark: benchmark_array_xd.json

| metric | read_batch_formatted_as_numpy after write_array2d | read_batch_formatted_as_numpy after write_flattened_sequence | read_batch_formatted_as_numpy after write_nested_sequence | read_batch_unformated after write_array2d | read_batch_unformated after write_flattened_sequence | read_batch_unformated after write_nested_sequence | read_col_formatted_as_numpy after write_array2d | read_col_formatted_as_numpy after write_flattened_sequence | read_col_formatted_as_numpy after write_nested_sequence | read_col_unformated after write_array2d | read_col_unformated after write_flattened_sequence | read_col_unformated after write_nested_sequence | read_formatted_as_numpy after write_array2d | read_formatted_as_numpy after write_flattened_sequence | read_formatted_as_numpy after write_nested_sequence | read_unformated after write_array2d | read_unformated after write_flattened_sequence | read_unformated after write_nested_sequence | write_array2d | write_flattened_sequence | write_nested_sequence |
|--------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 0.006543 / 0.011353 (-0.004809) | 0.004085 / 0.011008 (-0.006924) | 0.083989 / 0.038508 (0.045481) | 0.074733 / 0.023109 (0.051623) | 0.310839 / 0.275898 (0.034941) | 0.333540 / 0.323480 (0.010060) | 0.005566 / 0.007986 (-0.002419) | 0.003461 / 0.004328 (-0.000868) | 0.065194 / 0.004250 (0.060943) | 0.057007 / 0.037052 (0.019954) | 0.325633 / 0.258489 (0.067144) | 0.351665 / 0.293841 (0.057824) | 0.030561 / 0.128546 (-0.097985) | 0.008579 / 0.075646 (-0.067068) | 0.287457 / 0.419271 (-0.131815) | 0.063554 / 0.043533 (0.020021) | 0.309182 / 0.255139 (0.054043) | 0.327809 / 0.283200 (0.044609) | 0.034470 / 0.141683 (-0.107213) | 1.452098 / 1.452155 (-0.000057) | 1.527130 / 1.492716 (0.034414) |

### Benchmark: benchmark_getitem\_100B.json

| metric | get_batch_of\_1024\_random_rows | get_batch_of\_1024\_rows | get_first_row | get_last_row |
|--------|---|---|---|---|
| new / old (diff) | 0.241736 / 0.018006 (0.223729) | 0.552432 / 0.000490 (0.551943) | 0.004085 / 0.000200 (0.003885) | 0.000089 / 0.000054 (0.000035) |

### Benchmark: benchmark_indices_mapping.json

| metric | select | shard | shuffle | sort | train_test_split |
|--------|---|---|---|---|---|
| new / old (diff) | 0.027290 / 0.037411 (-0.010121) | 0.081250 / 0.014526 (0.066724) | 0.094739 / 0.176557 (-0.081818) | 0.150424 / 0.737135 (-0.586711) | 0.095488 / 0.296338 (-0.200851) |

### Benchmark: benchmark_iterating.json

| metric | read 5000 | read 50000 | read_batch 50000 10 | read_batch 50000 100 | read_batch 50000 1000 | read_formatted numpy 5000 | read_formatted pandas 5000 | read_formatted tensorflow 5000 | read_formatted torch 5000 | read_formatted_batch numpy 5000 10 | read_formatted_batch numpy 5000 1000 | shuffled read 5000 | shuffled read 50000 | shuffled read_batch 50000 10 | shuffled read_batch 50000 100 | shuffled read_batch 50000 1000 | shuffled read_formatted numpy 5000 | shuffled read_formatted_batch numpy 5000 10 | shuffled read_formatted_batch numpy 5000 1000 |
|--------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 0.377245 / 0.215209 (0.162036) | 3.781021 / 2.077655 (1.703366) | 1.820092 / 1.504120 (0.315972) | 1.654420 / 1.541195 (0.113225) | 1.751256 / 1.468490 (0.282766) | 0.475161 / 4.584777 (-4.109616) | 3.603462 / 3.745712 (-0.142251) | 5.437837 / 5.269862 (0.167975) | 3.305598 / 4.565676 (-1.260079) | 0.055856 / 0.424275 (-0.368419) | 0.007259 / 0.007607 (-0.000348) | 0.454205 / 0.226044 (0.228161) | 4.544157 / 2.268929 (2.275229) | 2.296776 / 55.444624 (-53.147848) | 1.951017 / 6.876477 (-4.925459) | 2.128759 / 2.142072 (-0.013313) | 0.590354 / 4.805227 (-4.214873) | 0.129974 / 6.500664 (-6.370690) | 0.059506 / 0.075469 (-0.015963) |

### Benchmark: benchmark_map_filter.json

| metric | filter | map fast-tokenizer batched | map identity | map identity batched | map no-op batched | map no-op batched numpy | map no-op batched pandas | map no-op batched pytorch | map no-op batched tensorflow |
|--------|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 1.285866 / 1.841788 (-0.555921) | 19.419446 / 8.074308 (11.345138) | 13.985108 / 10.191392 (3.793716) | 0.146803 / 0.680424 (-0.533620) | 0.018176 / 0.534201 (-0.516025) | 0.392345 / 0.579283 (-0.186938) | 0.405394 / 0.434364 (-0.028970) | 0.454649 / 0.540337 (-0.085688) | 0.633075 / 1.386936 (-0.753861) |

</details>
PyArrow==latest

<details>
<summary>Show updated benchmarks!</summary>

### Benchmark: benchmark_array_xd.json

| metric | read_batch_formatted_as_numpy after write_array2d | read_batch_formatted_as_numpy after write_flattened_sequence | read_batch_formatted_as_numpy after write_nested_sequence | read_batch_unformated after write_array2d | read_batch_unformated after write_flattened_sequence | read_batch_unformated after write_nested_sequence | read_col_formatted_as_numpy after write_array2d | read_col_formatted_as_numpy after write_flattened_sequence | read_col_formatted_as_numpy after write_nested_sequence | read_col_unformated after write_array2d | read_col_unformated after write_flattened_sequence | read_col_unformated after write_nested_sequence | read_formatted_as_numpy after write_array2d | read_formatted_as_numpy after write_flattened_sequence | read_formatted_as_numpy after write_nested_sequence | read_unformated after write_array2d | read_unformated after write_flattened_sequence | read_unformated after write_nested_sequence | write_array2d | write_flattened_sequence | write_nested_sequence |
|--------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 0.006497 / 0.011353 (-0.004855) | 0.004092 / 0.011008 (-0.006916) | 0.064908 / 0.038508 (0.026400) | 0.073494 / 0.023109 (0.050385) | 0.382227 / 0.275898 (0.106329) | 0.407320 / 0.323480 (0.083840) | 0.005653 / 0.007986 (-0.002332) | 0.003500 / 0.004328 (-0.000829) | 0.064570 / 0.004250 (0.060320) | 0.058733 / 0.037052 (0.021681) | 0.385702 / 0.258489 (0.127213) | 0.426463 / 0.293841 (0.132622) | 0.031073 / 0.128546 (-0.097473) | 0.008710 / 0.075646 (-0.066936) | 0.071378 / 0.419271 (-0.347893) | 0.050141 / 0.043533 (0.006608) | 0.377769 / 0.255139 (0.122630) | 0.395016 / 0.283200 (0.111816) | 0.025158 / 0.141683 (-0.116525) | 1.470503 / 1.452155 (0.018348) | 1.532742 / 1.492716 (0.040026) |

### Benchmark: benchmark_getitem\_100B.json

| metric | get_batch_of\_1024\_random_rows | get_batch_of\_1024\_rows | get_first_row | get_last_row |
|--------|---|---|---|---|
| new / old (diff) | 0.214249 / 0.018006 (0.196243) | 0.583580 / 0.000490 (0.583090) | 0.004027 / 0.000200 (0.003828) | 0.000104 / 0.000054 (0.000050) |

### Benchmark: benchmark_indices_mapping.json

| metric | select | shard | shuffle | sort | train_test_split |
|--------|---|---|---|---|---|
| new / old (diff) | 0.030186 / 0.037411 (-0.007226) | 0.086927 / 0.014526 (0.072401) | 0.102060 / 0.176557 (-0.074497) | 0.156281 / 0.737135 (-0.580855) | 0.100825 / 0.296338 (-0.195514) |

### Benchmark: benchmark_iterating.json

| metric | read 5000 | read 50000 | read_batch 50000 10 | read_batch 50000 100 | read_batch 50000 1000 | read_formatted numpy 5000 | read_formatted pandas 5000 | read_formatted tensorflow 5000 | read_formatted torch 5000 | read_formatted_batch numpy 5000 10 | read_formatted_batch numpy 5000 1000 | shuffled read 5000 | shuffled read 50000 | shuffled read_batch 50000 10 | shuffled read_batch 50000 100 | shuffled read_batch 50000 1000 | shuffled read_formatted numpy 5000 | shuffled read_formatted_batch numpy 5000 10 | shuffled read_formatted_batch numpy 5000 1000 |
|--------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 0.419942 / 0.215209 (0.204733) | 4.183797 / 2.077655 (2.106142) | 2.205079 / 1.504120 (0.700959) | 2.071219 / 1.541195 (0.530024) | 2.194047 / 1.468490 (0.725557) | 0.478768 / 4.584777 (-4.106009) | 3.584864 / 3.745712 (-0.160848) | 3.371635 / 5.269862 (-1.898227) | 2.022134 / 4.565676 (-2.543542) | 0.056553 / 0.424275 (-0.367722) | 0.007231 / 0.007607 (-0.000376) | 0.493158 / 0.226044 (0.267113) | 4.934370 / 2.268929 (2.665441) | 2.699593 / 55.444624 (-52.745031) | 2.396371 / 6.876477 (-4.480105) | 2.438052 / 2.142072 (0.295979) | 0.589578 / 4.805227 (-4.215649) | 0.147234 / 6.500664 (-6.353430) | 0.062049 / 0.075469 (-0.013420) |

### Benchmark: benchmark_map_filter.json

| metric | filter | map fast-tokenizer batched | map identity | map identity batched | map no-op batched | map no-op batched numpy | map no-op batched pandas | map no-op batched pytorch | map no-op batched tensorflow |
|--------|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 1.318246 / 1.841788 (-0.523542) | 19.829025 / 8.074308 (11.754717) | 14.314825 / 10.191392 (4.123433) | 0.168309 / 0.680424 (-0.512115) | 0.018596 / 0.534201 (-0.515605) | 0.397540 / 0.579283 (-0.181743) | 0.421280 / 0.434364 (-0.013084) | 0.479917 / 0.540337 (-0.060421) | 0.643494 / 1.386936 (-0.743442) |

</details>
</details>

![](https://cml.dev/watermark.png#5be59becaa65f1fa08129091b8c778823e4a50ac "CML watermark")
<details>
<summary>Show benchmarks</summary>

PyArrow==8.0.0

<details>
<summary>Show updated benchmarks!</summary>

### Benchmark: benchmark_array_xd.json

| metric | read_batch_formatted_as_numpy after write_array2d | read_batch_formatted_as_numpy after write_flattened_sequence | read_batch_formatted_as_numpy after write_nested_sequence | read_batch_unformated after write_array2d | read_batch_unformated after write_flattened_sequence | read_batch_unformated after write_nested_sequence | read_col_formatted_as_numpy after write_array2d | read_col_formatted_as_numpy after write_flattened_sequence | read_col_formatted_as_numpy after write_nested_sequence | read_col_unformated after write_array2d | read_col_unformated after write_flattened_sequence | read_col_unformated after write_nested_sequence | read_formatted_as_numpy after write_array2d | read_formatted_as_numpy after write_flattened_sequence | read_formatted_as_numpy after write_nested_sequence | read_unformated after write_array2d | read_unformated after write_flattened_sequence | read_unformated after write_nested_sequence | write_array2d | write_flattened_sequence | write_nested_sequence |
|--------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 0.008349 / 0.011353 (-0.003004) | 0.005362 / 0.011008 (-0.005646) | 0.100777 / 0.038508 (0.062269) | 0.078719 / 0.023109 (0.055609) | 0.398105 / 0.275898 (0.122207) | 0.444189 / 0.323480 (0.120709) | 0.006834 / 0.007986 (-0.001152) | 0.004642 / 0.004328 (0.000314) | 0.076284 / 0.004250 (0.072034) | 0.062738 / 0.037052 (0.025685) | 0.409532 / 0.258489 (0.151043) | 0.447218 / 0.293841 (0.153377) | 0.052996 / 0.128546 (-0.075550) | 0.012977 / 0.075646 (-0.062669) | 0.347687 / 0.419271 (-0.071585) | 0.068076 / 0.043533 (0.024543) | 0.394526 / 0.255139 (0.139387) | 0.434110 / 0.283200 (0.150910) | 0.041719 / 0.141683 (-0.099963) | 1.759109 / 1.452155 (0.306955) | 1.866049 / 1.492716 (0.373333) |

### Benchmark: benchmark_getitem\_100B.json

| metric | get_batch_of\_1024\_random_rows | get_batch_of\_1024\_rows | get_first_row | get_last_row |
|--------|---|---|---|---|
| new / old (diff) | 0.287633 / 0.018006 (0.269627) | 0.611540 / 0.000490 (0.611051) | 0.005388 / 0.000200 (0.005188) | 0.000096 / 0.000054 (0.000042) |

### Benchmark: benchmark_indices_mapping.json

| metric | select | shard | shuffle | sort | train_test_split |
|--------|---|---|---|---|---|
| new / old (diff) | 0.027394 / 0.037411 (-0.010017) | 0.089796 / 0.014526 (0.075270) | 0.106931 / 0.176557 (-0.069625) | 0.173560 / 0.737135 (-0.563575) | 0.106948 / 0.296338 (-0.189391) |

### Benchmark: benchmark_iterating.json

| metric | read 5000 | read 50000 | read_batch 50000 10 | read_batch 50000 100 | read_batch 50000 1000 | read_formatted numpy 5000 | read_formatted pandas 5000 | read_formatted tensorflow 5000 | read_formatted torch 5000 | read_formatted_batch numpy 5000 10 | read_formatted_batch numpy 5000 1000 | shuffled read 5000 | shuffled read 50000 | shuffled read_batch 50000 10 | shuffled read_batch 50000 100 | shuffled read_batch 50000 1000 | shuffled read_formatted numpy 5000 | shuffled read_formatted_batch numpy 5000 10 | shuffled read_formatted_batch numpy 5000 1000 |
|--------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 0.575156 / 0.215209 (0.359947) | 5.674170 / 2.077655 (3.596516) | 2.463090 / 1.504120 (0.958971) | 2.128245 / 1.541195 (0.587050) | 2.118982 / 1.468490 (0.650492) | 0.876976 / 4.584777 (-3.707801) | 5.238229 / 3.745712 (1.492517) | 4.548788 / 5.269862 (-0.721074) | 2.905243 / 4.565676 (-1.660433) | 0.090750 / 0.424275 (-0.333525) | 0.008266 / 0.007607 (0.000659) | 0.693305 / 0.226044 (0.467260) | 7.126970 / 2.268929 (4.858041) | 3.152131 / 55.444624 (-52.292494) | 2.532118 / 6.876477 (-4.344359) | 2.678442 / 2.142072 (0.536369) | 0.932745 / 4.805227 (-3.872483) | 0.196290 / 6.500664 (-6.304374) | 0.074082 / 0.075469 (-0.001387) |

### Benchmark: benchmark_map_filter.json

| metric | filter | map fast-tokenizer batched | map identity | map identity batched | map no-op batched | map no-op batched numpy | map no-op batched pandas | map no-op batched pytorch | map no-op batched tensorflow |
|--------|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 1.599636 / 1.841788 (-0.242152) | 23.271435 / 8.074308 (15.197127) | 19.696709 / 10.191392 (9.505317) | 0.222668 / 0.680424 (-0.457756) | 0.029088 / 0.534201 (-0.505113) | 0.492477 / 0.579283 (-0.086806) | 0.580578 / 0.434364 (0.146214) | 0.558852 / 0.540337 (0.018514) | 0.762083 / 1.386936 (-0.624853) |

</details>
PyArrow==latest

<details>
<summary>Show updated benchmarks!</summary>

### Benchmark: benchmark_array_xd.json

| metric | read_batch_formatted_as_numpy after write_array2d | read_batch_formatted_as_numpy after write_flattened_sequence | read_batch_formatted_as_numpy after write_nested_sequence | read_batch_unformated after write_array2d | read_batch_unformated after write_flattened_sequence | read_batch_unformated after write_nested_sequence | read_col_formatted_as_numpy after write_array2d | read_col_formatted_as_numpy after write_flattened_sequence | read_col_formatted_as_numpy after write_nested_sequence | read_col_unformated after write_array2d | read_col_unformated after write_flattened_sequence | read_col_unformated after write_nested_sequence | read_formatted_as_numpy after write_array2d | read_formatted_as_numpy after write_flattened_sequence | read_formatted_as_numpy after write_nested_sequence | read_unformated after write_array2d | read_unformated after write_flattened_sequence | read_unformated after write_nested_sequence | write_array2d | write_flattened_sequence | write_nested_sequence |
|--------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 0.009021 / 0.011353 (-0.002332) | 0.005011 / 0.011008 (-0.005997) | 0.076504 / 0.038508 (0.037996) | 0.077303 / 0.023109 (0.054193) | 0.480660 / 0.275898 (0.204762) | 0.493944 / 0.323480 (0.170464) | 0.006339 / 0.007986 (-0.001646) | 0.004302 / 0.004328 (-0.000026) | 0.076228 / 0.004250 (0.071978) | 0.060805 / 0.037052 (0.023753) | 0.477539 / 0.258489 (0.219050) | 0.496799 / 0.293841 (0.202958) | 0.049495 / 0.128546 (-0.079052) | 0.013333 / 0.075646 (-0.062313) | 0.087217 / 0.419271 (-0.332055) | 0.061451 / 0.043533 (0.017918) | 0.485169 / 0.255139 (0.230030) | 0.487348 / 0.283200 (0.204149) | 0.035874 / 0.141683 (-0.105809) | 1.829137 / 1.452155 (0.376982) | 1.906151 / 1.492716 (0.413435) |

### Benchmark: benchmark_getitem\_100B.json

| metric | get_batch_of\_1024\_random_rows | get_batch_of\_1024\_rows | get_first_row | get_last_row |
|--------|---|---|---|---|
| new / old (diff) | 0.304526 / 0.018006 (0.286520) | 0.627499 / 0.000490 (0.627009) | 0.003786 / 0.000200 (0.003586) | 0.000098 / 0.000054 (0.000043) |

### Benchmark: benchmark_indices_mapping.json

| metric | select | shard | shuffle | sort | train_test_split |
|--------|---|---|---|---|---|
| new / old (diff) | 0.035512 / 0.037411 (-0.001899) | 0.096684 / 0.014526 (0.082158) | 0.111879 / 0.176557 (-0.064678) | 0.171489 / 0.737135 (-0.565647) | 0.112175 / 0.296338 (-0.184164) |

### Benchmark: benchmark_iterating.json

| metric | read 5000 | read 50000 | read_batch 50000 10 | read_batch 50000 100 | read_batch 50000 1000 | read_formatted numpy 5000 | read_formatted pandas 5000 | read_formatted tensorflow 5000 | read_formatted torch 5000 | read_formatted_batch numpy 5000 10 | read_formatted_batch numpy 5000 1000 | shuffled read 5000 | shuffled read 50000 | shuffled read_batch 50000 10 | shuffled read_batch 50000 100 | shuffled read_batch 50000 1000 | shuffled read_formatted numpy 5000 | shuffled read_formatted_batch numpy 5000 10 | shuffled read_formatted_batch numpy 5000 1000 |
|--------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 0.604791 / 0.215209 (0.389582) | 6.089137 / 2.077655 (4.011482) | 2.883237 / 1.504120 (1.379117) | 2.561109 / 1.541195 (1.019914) | 2.542400 / 1.468490 (1.073910) | 0.852828 / 4.584777 (-3.731949) | 5.236812 / 3.745712 (1.491100) | 4.756429 / 5.269862 (-0.513432) | 2.885660 / 4.565676 (-1.680016) | 0.095643 / 0.424275 (-0.328632) | 0.008403 / 0.007607 (0.000796) | 0.727707 / 0.226044 (0.501663) | 7.428002 / 2.268929 (5.159074) | 3.816051 / 55.444624 (-51.628573) | 2.971057 / 6.876477 (-3.905420) | 2.915965 / 2.142072 (0.773893) | 1.006553 / 4.805227 (-3.798674) | 0.201840 / 6.500664 (-6.298824) | 0.080795 / 0.075469 (0.005326) |

### Benchmark: benchmark_map_filter.json

| metric | filter | map fast-tokenizer batched | map identity | map identity batched | map no-op batched | map no-op batched numpy | map no-op batched pandas | map no-op batched pytorch | map no-op batched tensorflow |
|--------|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 1.794951 / 1.841788 (-0.046837) | 23.624556 / 8.074308 (15.550248) | 21.856195 / 10.191392 (11.664802) | 0.253043 / 0.680424 (-0.427381) | 0.031201 / 0.534201 (-0.503000) | 0.461641 / 0.579283 (-0.117642) | 0.577789 / 0.434364 (0.143425) | 0.569197 / 0.540337 (0.028860) | 0.780111 / 1.386936 (-0.606825) |

</details>
</details>

![](https://cml.dev/watermark.png#4904f14459c862f0ab525ec034a636177be5dee4 "CML watermark")
<details>
<summary>Show benchmarks</summary>

PyArrow==8.0.0

<details>
<summary>Show updated benchmarks!</summary>

### Benchmark: benchmark_array_xd.json

| metric | read_batch_formatted_as_numpy after write_array2d | read_batch_formatted_as_numpy after write_flattened_sequence | read_batch_formatted_as_numpy after write_nested_sequence | read_batch_unformated after write_array2d | read_batch_unformated after write_flattened_sequence | read_batch_unformated after write_nested_sequence | read_col_formatted_as_numpy after write_array2d | read_col_formatted_as_numpy after write_flattened_sequence | read_col_formatted_as_numpy after write_nested_sequence | read_col_unformated after write_array2d | read_col_unformated after write_flattened_sequence | read_col_unformated after write_nested_sequence | read_formatted_as_numpy after write_array2d | read_formatted_as_numpy after write_flattened_sequence | read_formatted_as_numpy after write_nested_sequence | read_unformated after write_array2d | read_unformated after write_flattened_sequence | read_unformated after write_nested_sequence | write_array2d | write_flattened_sequence | write_nested_sequence |
|--------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 0.007646 / 0.011353 (-0.003707) | 0.004750 / 0.011008 (-0.006258) | 0.097981 / 0.038508 (0.059473) | 0.088989 / 0.023109 (0.065880) | 0.377732 / 0.275898 (0.101834) | 0.406805 / 0.323480 (0.083325) | 0.006389 / 0.007986 (-0.001597) | 0.003854 / 0.004328 (-0.000474) | 0.073977 / 0.004250 (0.069727) | 0.066497 / 0.037052 (0.029444) | 0.371498 / 0.258489 (0.113009) | 0.417352 / 0.293841 (0.123511) | 0.036326 / 0.128546 (-0.092220) | 0.009876 / 0.075646 (-0.065770) | 0.330142 / 0.419271 (-0.089130) | 0.062423 / 0.043533 (0.018890) | 0.369375 / 0.255139 (0.114236) | 0.406048 / 0.283200 (0.122848) | 0.026564 / 0.141683 (-0.115119) | 1.713295 / 1.452155 (0.261140) | 1.797493 / 1.492716 (0.304777) |

### Benchmark: benchmark_getitem\_100B.json

| metric | get_batch_of\_1024\_random_rows | get_batch_of\_1024\_rows | get_first_row | get_last_row |
|--------|---|---|---|---|
| new / old (diff) | 0.231889 / 0.018006 (0.213882) | 0.512497 / 0.000490 (0.512007) | 0.000390 / 0.000200 (0.000190) | 0.000069 / 0.000054 (0.000015) |

### Benchmark: benchmark_indices_mapping.json

| metric | select | shard | shuffle | sort | train_test_split |
|--------|---|---|---|---|---|
| new / old (diff) | 0.033978 / 0.037411 (-0.003433) | 0.100117 / 0.014526 (0.085592) | 0.112460 / 0.176557 (-0.064097) | 0.179936 / 0.737135 (-0.557200) | 0.114277 / 0.296338 (-0.182061) |

### Benchmark: benchmark_iterating.json

| metric | read 5000 | read 50000 | read_batch 50000 10 | read_batch 50000 100 | read_batch 50000 1000 | read_formatted numpy 5000 | read_formatted pandas 5000 | read_formatted tensorflow 5000 | read_formatted torch 5000 | read_formatted_batch numpy 5000 10 | read_formatted_batch numpy 5000 1000 | shuffled read 5000 | shuffled read 50000 | shuffled read_batch 50000 10 | shuffled read_batch 50000 100 | shuffled read_batch 50000 1000 | shuffled read_formatted numpy 5000 | shuffled read_formatted_batch numpy 5000 10 | shuffled read_formatted_batch numpy 5000 1000 |
|--------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 0.461320 / 0.215209 (0.246111) | 4.563180 / 2.077655 (2.485526) | 2.249474 / 1.504120 (0.745354) | 2.100450 / 1.541195 (0.559255) | 2.231080 / 1.468490 (0.762590) | 0.567907 / 4.584777 (-4.016870) | 4.117233 / 3.745712 (0.371521) | 4.943159 / 5.269862 (-0.326703) | 3.112299 / 4.565676 (-1.453377) | 0.065500 / 0.424275 (-0.358775) | 0.008407 / 0.007607 (0.000800) | 0.545928 / 0.226044 (0.319883) | 5.508058 / 2.268929 (3.239129) | 2.834645 / 55.444624 (-52.609980) | 2.440328 / 6.876477 (-4.436148) | 2.680483 / 2.142072 (0.538410) | 0.697191 / 4.805227 (-4.108036) | 0.176646 / 6.500664 (-6.324018) | 0.073608 / 0.075469 (-0.001861) |

### Benchmark: benchmark_map_filter.json

| metric | filter | map fast-tokenizer batched | map identity | map identity batched | map no-op batched | map no-op batched numpy | map no-op batched pandas | map no-op batched pytorch | map no-op batched tensorflow |
|--------|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 1.451865 / 1.841788 (-0.389922) | 22.752595 / 8.074308 (14.678287) | 15.543338 / 10.191392 (5.351946) | 0.214644 / 0.680424 (-0.465780) | 0.022050 / 0.534201 (-0.512151) | 0.463898 / 0.579283 (-0.115385) | 0.481691 / 0.434364 (0.047327) | 0.549715 / 0.540337 (0.009378) | 0.773595 / 1.386936 (-0.613341) |

</details>
PyArrow==latest

<details>
<summary>Show updated benchmarks!</summary>

### Benchmark: benchmark_array_xd.json

| metric | read_batch_formatted_as_numpy after write_array2d | read_batch_formatted_as_numpy after write_flattened_sequence | read_batch_formatted_as_numpy after write_nested_sequence | read_batch_unformated after write_array2d | read_batch_unformated after write_flattened_sequence | read_batch_unformated after write_nested_sequence | read_col_formatted_as_numpy after write_array2d | read_col_formatted_as_numpy after write_flattened_sequence | read_col_formatted_as_numpy after write_nested_sequence | read_col_unformated after write_array2d | read_col_unformated after write_flattened_sequence | read_col_unformated after write_nested_sequence | read_formatted_as_numpy after write_array2d | read_formatted_as_numpy after write_flattened_sequence | read_formatted_as_numpy after write_nested_sequence | read_unformated after write_array2d | read_unformated after write_flattened_sequence | read_unformated after write_nested_sequence | write_array2d | write_flattened_sequence | write_nested_sequence |
|--------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 0.007541 / 0.011353 (-0.003812) | 0.004715 / 0.011008 (-0.006293) | 0.076782 / 0.038508 (0.038274) | 0.086242 / 0.023109 (0.063133) | 0.458053 / 0.275898 (0.182155) | 0.503097 / 0.323480 (0.179617) | 0.006262 / 0.007986 (-0.001724) | 0.003882 / 0.004328 (-0.000447) | 0.075669 / 0.004250 (0.071419) | 0.066004 / 0.037052 (0.028952) | 0.469439 / 0.258489 (0.210950) | 0.529744 / 0.293841 (0.235903) | 0.037228 / 0.128546 (-0.091319) | 0.009794 / 0.075646 (-0.065852) | 0.082464 / 0.419271 (-0.336808) | 0.058797 / 0.043533 (0.015264) | 0.452069 / 0.255139 (0.196930) | 0.488246 / 0.283200 (0.205046) | 0.029324 / 0.141683 (-0.112359) | 1.742237 / 1.452155 (0.290082) | 1.839676 / 1.492716 (0.346959) |

### Benchmark: benchmark_getitem\_100B.json

| metric | get_batch_of\_1024\_random_rows | get_batch_of\_1024\_rows | get_first_row | get_last_row |
|--------|---|---|---|---|
| new / old (diff) | 0.228106 / 0.018006 (0.210100) | 0.491632 / 0.000490 (0.491142) | 0.004993 / 0.000200 (0.004793) | 0.000114 / 0.000054 (0.000060) |

### Benchmark: benchmark_indices_mapping.json

| metric | select | shard | shuffle | sort | train_test_split |
|--------|---|---|---|---|---|
| new / old (diff) | 0.035413 / 0.037411 (-0.001999) | 0.104617 / 0.014526 (0.090091) | 0.121948 / 0.176557 (-0.054609) | 0.186233 / 0.737135 (-0.550902) | 0.121574 / 0.296338 (-0.174764) |

### Benchmark: benchmark_iterating.json

| metric | read 5000 | read 50000 | read_batch 50000 10 | read_batch 50000 100 | read_batch 50000 1000 | read_formatted numpy 5000 | read_formatted pandas 5000 | read_formatted tensorflow 5000 | read_formatted torch 5000 | read_formatted_batch numpy 5000 10 | read_formatted_batch numpy 5000 1000 | shuffled read 5000 | shuffled read 50000 | shuffled read_batch 50000 10 | shuffled read_batch 50000 100 | shuffled read_batch 50000 1000 | shuffled read_formatted numpy 5000 | shuffled read_formatted_batch numpy 5000 10 | shuffled read_formatted_batch numpy 5000 1000 |
|--------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 0.473849 / 0.215209 (0.258640) | 4.788312 / 2.077655 (2.710657) | 2.470535 / 1.504120 (0.966415) | 2.270393 / 1.541195 (0.729198) | 2.361096 / 1.468490 (0.892606) | 0.556184 / 4.584777 (-4.028593) | 4.216852 / 3.745712 (0.471140) | 3.901718 / 5.269862 (-1.368143) | 2.355209 / 4.565676 (-2.210467) | 0.066708 / 0.424275 (-0.357567) | 0.008709 / 0.007607 (0.001102) | 0.571714 / 0.226044 (0.345669) | 5.663150 / 2.268929 (3.394221) | 3.025769 / 55.444624 (-52.418855) | 2.652554 / 6.876477 (-4.223923) | 2.750555 / 2.142072 (0.608483) | 0.681536 / 4.805227 (-4.123691) | 0.157187 / 6.500664 (-6.343477) | 0.073533 / 0.075469 (-0.001936) |

### Benchmark: benchmark_map_filter.json

| metric | filter | map fast-tokenizer batched | map identity | map identity batched | map no-op batched | map no-op batched numpy | map no-op batched pandas | map no-op batched pytorch | map no-op batched tensorflow |
|--------|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 1.604630 / 1.841788 (-0.237158) | 22.735629 / 8.074308 (14.661321) | 16.762347 / 10.191392 (6.570955) | 0.175514 / 0.680424 (-0.504910) | 0.021497 / 0.534201 (-0.512704) | 0.461438 / 0.579283 (-0.117845) | 0.476184 / 0.434364 (0.041820) | 0.571048 / 0.540337 (0.030710) | 0.747086 / 1.386936 (-0.639850) |

</details>
</details>

![](https://cml.dev/watermark.png#6ea38fc40ee2b10d3b5c6df09b09ad05e02a2cff "CML watermark")
<details>
<summary>Show benchmarks</summary>

PyArrow==8.0.0

<details>
<summary>Show updated benchmarks!</summary>

### Benchmark: benchmark_array_xd.json

| metric | read_batch_formatted_as_numpy after write_array2d | read_batch_formatted_as_numpy after write_flattened_sequence | read_batch_formatted_as_numpy after write_nested_sequence | read_batch_unformated after write_array2d | read_batch_unformated after write_flattened_sequence | read_batch_unformated after write_nested_sequence | read_col_formatted_as_numpy after write_array2d | read_col_formatted_as_numpy after write_flattened_sequence | read_col_formatted_as_numpy after write_nested_sequence | read_col_unformated after write_array2d | read_col_unformated after write_flattened_sequence | read_col_unformated after write_nested_sequence | read_formatted_as_numpy after write_array2d | read_formatted_as_numpy after write_flattened_sequence | read_formatted_as_numpy after write_nested_sequence | read_unformated after write_array2d | read_unformated after write_flattened_sequence | read_unformated after write_nested_sequence | write_array2d | write_flattened_sequence | write_nested_sequence |
|--------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 0.006889 / 0.011353 (-0.004464) | 0.004241 / 0.011008 (-0.006767) | 0.084542 / 0.038508 (0.046034) | 0.080484 / 0.023109 (0.057374) | 0.309356 / 0.275898 (0.033458) | 0.338548 / 0.323480 (0.015068) | 0.004904 / 0.007986 (-0.003082) | 0.005220 / 0.004328 (0.000892) | 0.065501 / 0.004250 (0.061251) | 0.062095 / 0.037052 (0.025043) | 0.317332 / 0.258489 (0.058843) | 0.364797 / 0.293841 (0.070956) | 0.030492 / 0.128546 (-0.098054) | 0.008991 / 0.075646 (-0.066656) | 0.288274 / 0.419271 (-0.130998) | 0.052582 / 0.043533 (0.009049) | 0.310838 / 0.255139 (0.055699) | 0.346304 / 0.283200 (0.063104) | 0.027968 / 0.141683 (-0.113715) | 1.509727 / 1.452155 (0.057573) | 1.577410 / 1.492716 (0.084694) |

### Benchmark: benchmark_getitem\_100B.json

| metric | get_batch_of\_1024\_random_rows | get_batch_of\_1024\_rows | get_first_row | get_last_row |
|--------|---|---|---|---|
| new / old (diff) | 0.269725 / 0.018006 (0.251719) | 0.627685 / 0.000490 (0.627195) | 0.000419 / 0.000200 (0.000219) | 0.000060 / 0.000054 (0.000006) |

### Benchmark: benchmark_indices_mapping.json

| metric | select | shard | shuffle | sort | train_test_split |
|--------|---|---|---|---|---|
| new / old (diff) | 0.031022 / 0.037411 (-0.006389) | 0.081858 / 0.014526 (0.067332) | 0.099477 / 0.176557 (-0.077080) | 0.162981 / 0.737135 (-0.574154) | 0.101987 / 0.296338 (-0.194351) |

### Benchmark: benchmark_iterating.json

| metric | read 5000 | read 50000 | read_batch 50000 10 | read_batch 50000 100 | read_batch 50000 1000 | read_formatted numpy 5000 | read_formatted pandas 5000 | read_formatted tensorflow 5000 | read_formatted torch 5000 | read_formatted_batch numpy 5000 10 | read_formatted_batch numpy 5000 1000 | shuffled read 5000 | shuffled read 50000 | shuffled read_batch 50000 10 | shuffled read_batch 50000 100 | shuffled read_batch 50000 1000 | shuffled read_formatted numpy 5000 | shuffled read_formatted_batch numpy 5000 10 | shuffled read_formatted_batch numpy 5000 1000 |
|--------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 0.386297 / 0.215209 (0.171088) | 3.845321 / 2.077655 (1.767666) | 1.834446 / 1.504120 (0.330326) | 1.699730 / 1.541195 (0.158536) | 1.764342 / 1.468490 (0.295852) | 0.486423 / 4.584777 (-4.098354) | 3.527595 / 3.745712 (-0.218117) | 4.137034 / 5.269862 (-1.132827) | 2.590457 / 4.565676 (-1.975219) | 0.057598 / 0.424275 (-0.366677) | 0.007318 / 0.007607 (-0.000289) | 0.460775 / 0.226044 (0.234730) | 4.627576 / 2.268929 (2.358647) | 2.402566 / 55.444624 (-53.042059) | 2.011392 / 6.876477 (-4.865085) | 2.223915 / 2.142072 (0.081842) | 0.623217 / 4.805227 (-4.182011) | 0.148875 / 6.500664 (-6.351789) | 0.059799 / 0.075469 (-0.015671) |

### Benchmark: benchmark_map_filter.json

| metric | filter | map fast-tokenizer batched | map identity | map identity batched | map no-op batched | map no-op batched numpy | map no-op batched pandas | map no-op batched pytorch | map no-op batched tensorflow |
|--------|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 1.290768 / 1.841788 (-0.551020) | 20.455083 / 8.074308 (12.380775) | 13.469846 / 10.191392 (3.278454) | 0.170329 / 0.680424 (-0.510095) | 0.018409 / 0.534201 (-0.515792) | 0.394356 / 0.579283 (-0.184927) | 0.422685 / 0.434364 (-0.011679) | 0.476241 / 0.540337 (-0.064096) | 0.662682 / 1.386936 (-0.724254) |

</details>
PyArrow==latest

<details>
<summary>Show updated benchmarks!</summary>

### Benchmark: benchmark_array_xd.json

| metric | read_batch_formatted_as_numpy after write_array2d | read_batch_formatted_as_numpy after write_flattened_sequence | read_batch_formatted_as_numpy after write_nested_sequence | read_batch_unformated after write_array2d | read_batch_unformated after write_flattened_sequence | read_batch_unformated after write_nested_sequence | read_col_formatted_as_numpy after write_array2d | read_col_formatted_as_numpy after write_flattened_sequence | read_col_formatted_as_numpy after write_nested_sequence | read_col_unformated after write_array2d | read_col_unformated after write_flattened_sequence | read_col_unformated after write_nested_sequence | read_formatted_as_numpy after write_array2d | read_formatted_as_numpy after write_flattened_sequence | read_formatted_as_numpy after write_nested_sequence | read_unformated after write_array2d | read_unformated after write_flattened_sequence | read_unformated after write_nested_sequence | write_array2d | write_flattened_sequence | write_nested_sequence |
|--------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 0.006724 / 0.011353 (-0.004629) | 0.004508 / 0.011008 (-0.006500) | 0.065304 / 0.038508 (0.026796) | 0.080243 / 0.023109 (0.057133) | 0.384545 / 0.275898 (0.108647) | 0.415234 / 0.323480 (0.091754) | 0.006361 / 0.007986 (-0.001624) | 0.004193 / 0.004328 (-0.000135) | 0.065940 / 0.004250 (0.061689) | 0.063633 / 0.037052 (0.026581) | 0.392799 / 0.258489 (0.134310) | 0.443618 / 0.293841 (0.149777) | 0.031134 / 0.128546 (-0.097412) | 0.009058 / 0.075646 (-0.066588) | 0.071051 / 0.419271 (-0.348221) | 0.049096 / 0.043533 (0.005563) | 0.379526 / 0.255139 (0.124387) | 0.403370 / 0.283200 (0.120171) | 0.026378 / 0.141683 (-0.115305) | 1.457879 / 1.452155 (0.005724) | 1.562890 / 1.492716 (0.070174) |

### Benchmark: benchmark_getitem\_100B.json

| metric | get_batch_of\_1024\_random_rows | get_batch_of\_1024\_rows | get_first_row | get_last_row |
|--------|---|---|---|---|
| new / old (diff) | 0.304416 / 0.018006 (0.286410) | 0.626046 / 0.000490 (0.625557) | 0.000469 / 0.000200 (0.000269) | 0.000057 / 0.000054 (0.000002) |

### Benchmark: benchmark_indices_mapping.json

| metric | select | shard | shuffle | sort | train_test_split |
|--------|---|---|---|---|---|
| new / old (diff) | 0.032979 / 0.037411 (-0.004433) | 0.086769 / 0.014526 (0.072243) | 0.108188 / 0.176557 (-0.068369) | 0.163077 / 0.737135 (-0.574058) | 0.106276 / 0.296338 (-0.190062) |

### Benchmark: benchmark_iterating.json

| metric | read 5000 | read 50000 | read_batch 50000 10 | read_batch 50000 100 | read_batch 50000 1000 | read_formatted numpy 5000 | read_formatted pandas 5000 | read_formatted tensorflow 5000 | read_formatted torch 5000 | read_formatted_batch numpy 5000 10 | read_formatted_batch numpy 5000 1000 | shuffled read 5000 | shuffled read 50000 | shuffled read_batch 50000 10 | shuffled read_batch 50000 100 | shuffled read_batch 50000 1000 | shuffled read_formatted numpy 5000 | shuffled read_formatted_batch numpy 5000 10 | shuffled read_formatted_batch numpy 5000 1000 |
|--------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 0.406922 / 0.215209 (0.191713) | 4.052828 / 2.077655 (1.975174) | 2.084802 / 1.504120 (0.580682) | 1.927263 / 1.541195 (0.386069) | 1.956078 / 1.468490 (0.487587) | 0.480110 / 4.584777 (-4.104667) | 3.553022 / 3.745712 (-0.192691) | 3.554450 / 5.269862 (-1.715411) | 2.082681 / 4.565676 (-2.482995) | 0.056711 / 0.424275 (-0.367564) | 0.007374 / 0.007607 (-0.000234) | 0.480555 / 0.226044 (0.254510) | 4.795851 / 2.268929 (2.526923) | 2.606675 / 55.444624 (-52.837949) | 2.249964 / 6.876477 (-4.626512) | 2.274234 / 2.142072 (0.132162) | 0.571767 / 4.805227 (-4.233461) | 0.133312 / 6.500664 (-6.367352) | 0.061703 / 0.075469 (-0.013766) |

### Benchmark: benchmark_map_filter.json

| metric | filter | map fast-tokenizer batched | map identity | map identity batched | map no-op batched | map no-op batched numpy | map no-op batched pandas | map no-op batched pytorch | map no-op batched tensorflow |
|--------|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 1.354308 / 1.841788 (-0.487479) | 20.959352 / 8.074308 (12.885044) | 14.158420 / 10.191392 (3.967028) | 0.197959 / 0.680424 (-0.482465) | 0.018412 / 0.534201 (-0.515789) | 0.394307 / 0.579283 (-0.184976) | 0.402455 / 0.434364 (-0.031909) | 0.463314 / 0.540337 (-0.077024) | 0.621050 / 1.386936 (-0.765886) |

</details>
</details>

![](https://cml.dev/watermark.png#d7298d4d1b169442a8d0bc8c1667298bb89ca501 "CML watermark")
<details>
<summary>Show benchmarks</summary>

PyArrow==8.0.0

<details>
<summary>Show updated benchmarks!</summary>

### Benchmark: benchmark_array_xd.json

| metric | read_batch_formatted_as_numpy after write_array2d | read_batch_formatted_as_numpy after write_flattened_sequence | read_batch_formatted_as_numpy after write_nested_sequence | read_batch_unformated after write_array2d | read_batch_unformated after write_flattened_sequence | read_batch_unformated after write_nested_sequence | read_col_formatted_as_numpy after write_array2d | read_col_formatted_as_numpy after write_flattened_sequence | read_col_formatted_as_numpy after write_nested_sequence | read_col_unformated after write_array2d | read_col_unformated after write_flattened_sequence | read_col_unformated after write_nested_sequence | read_formatted_as_numpy after write_array2d | read_formatted_as_numpy after write_flattened_sequence | read_formatted_as_numpy after write_nested_sequence | read_unformated after write_array2d | read_unformated after write_flattened_sequence | read_unformated after write_nested_sequence | write_array2d | write_flattened_sequence | write_nested_sequence |
|--------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 0.007179 / 0.011353 (-0.004174) | 0.004318 / 0.011008 (-0.006690) | 0.085209 / 0.038508 (0.046701) | 0.089989 / 0.023109 (0.066880) | 0.328188 / 0.275898 (0.052290) | 0.346027 / 0.323480 (0.022547) | 0.005711 / 0.007986 (-0.002275) | 0.003703 / 0.004328 (-0.000625) | 0.065419 / 0.004250 (0.061169) | 0.065354 / 0.037052 (0.028301) | 0.314531 / 0.258489 (0.056042) | 0.354357 / 0.293841 (0.060516) | 0.030918 / 0.128546 (-0.097628) | 0.008632 / 0.075646 (-0.067015) | 0.286817 / 0.419271 (-0.132455) | 0.065267 / 0.043533 (0.021735) | 0.310918 / 0.255139 (0.055779) | 0.330497 / 0.283200 (0.047298) | 0.035695 / 0.141683 (-0.105988) | 1.471101 / 1.452155 (0.018947) | 1.538658 / 1.492716 (0.045942) |

### Benchmark: benchmark_getitem\_100B.json

| metric | get_batch_of\_1024\_random_rows | get_batch_of\_1024\_rows | get_first_row | get_last_row |
|--------|---|---|---|---|
| new / old (diff) | 0.254314 / 0.018006 (0.236308) | 0.591413 / 0.000490 (0.590923) | 0.006082 / 0.000200 (0.005882) | 0.000091 / 0.000054 (0.000037) |

### Benchmark: benchmark_indices_mapping.json

| metric | select | shard | shuffle | sort | train_test_split |
|--------|---|---|---|---|---|
| new / old (diff) | 0.031843 / 0.037411 (-0.005568) | 0.089968 / 0.014526 (0.075442) | 0.101838 / 0.176557 (-0.074718) | 0.164401 / 0.737135 (-0.572734) | 0.103785 / 0.296338 (-0.192554) |

### Benchmark: benchmark_iterating.json

| metric | read 5000 | read 50000 | read_batch 50000 10 | read_batch 50000 100 | read_batch 50000 1000 | read_formatted numpy 5000 | read_formatted pandas 5000 | read_formatted tensorflow 5000 | read_formatted torch 5000 | read_formatted_batch numpy 5000 10 | read_formatted_batch numpy 5000 1000 | shuffled read 5000 | shuffled read 50000 | shuffled read_batch 50000 10 | shuffled read_batch 50000 100 | shuffled read_batch 50000 1000 | shuffled read_formatted numpy 5000 | shuffled read_formatted_batch numpy 5000 10 | shuffled read_formatted_batch numpy 5000 1000 |
|--------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 0.380486 / 0.215209 (0.165277) | 3.798868 / 2.077655 (1.721213) | 1.824645 / 1.504120 (0.320525) | 1.660804 / 1.541195 (0.119610) | 1.784793 / 1.468490 (0.316303) | 0.487222 / 4.584777 (-4.097555) | 3.560580 / 3.745712 (-0.185132) | 5.392662 / 5.269862 (0.122800) | 3.295327 / 4.565676 (-1.270350) | 0.057699 / 0.424275 (-0.366576) | 0.007559 / 0.007607 (-0.000048) | 0.459655 / 0.226044 (0.233611) | 4.587583 / 2.268929 (2.318654) | 2.304845 / 55.444624 (-53.139779) | 1.966433 / 6.876477 (-4.910044) | 2.254591 / 2.142072 (0.112519) | 0.582978 / 4.805227 (-4.222250) | 0.133455 / 6.500664 (-6.367210) | 0.061924 / 0.075469 (-0.013546) |

### Benchmark: benchmark_map_filter.json

| metric | filter | map fast-tokenizer batched | map identity | map identity batched | map no-op batched | map no-op batched numpy | map no-op batched pandas | map no-op batched pytorch | map no-op batched tensorflow |
|--------|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 1.275685 / 1.841788 (-0.566103) | 20.814545 / 8.074308 (12.740237) | 13.753567 / 10.191392 (3.562175) | 0.164076 / 0.680424 (-0.516348) | 0.018768 / 0.534201 (-0.515433) | 0.390991 / 0.579283 (-0.188293) | 0.404417 / 0.434364 (-0.029947) | 0.457522 / 0.540337 (-0.082815) | 0.624654 / 1.386936 (-0.762282) |

</details>
PyArrow==latest

<details>
<summary>Show updated benchmarks!</summary>

### Benchmark: benchmark_array_xd.json

| metric | read_batch_formatted_as_numpy after write_array2d | read_batch_formatted_as_numpy after write_flattened_sequence | read_batch_formatted_as_numpy after write_nested_sequence | read_batch_unformated after write_array2d | read_batch_unformated after write_flattened_sequence | read_batch_unformated after write_nested_sequence | read_col_formatted_as_numpy after write_array2d | read_col_formatted_as_numpy after write_flattened_sequence | read_col_formatted_as_numpy after write_nested_sequence | read_col_unformated after write_array2d | read_col_unformated after write_flattened_sequence | read_col_unformated after write_nested_sequence | read_formatted_as_numpy after write_array2d | read_formatted_as_numpy after write_flattened_sequence | read_formatted_as_numpy after write_nested_sequence | read_unformated after write_array2d | read_unformated after write_flattened_sequence | read_unformated after write_nested_sequence | write_array2d | write_flattened_sequence | write_nested_sequence |
|--------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 0.007435 / 0.011353 (-0.003918) | 0.004255 / 0.011008 (-0.006754) | 0.066134 / 0.038508 (0.027626) | 0.086035 / 0.023109 (0.062925) | 0.364688 / 0.275898 (0.088790) | 0.403895 / 0.323480 (0.080415) | 0.005868 / 0.007986 (-0.002117) | 0.003634 / 0.004328 (-0.000694) | 0.065803 / 0.004250 (0.061553) | 0.065113 / 0.037052 (0.028061) | 0.370057 / 0.258489 (0.111568) | 0.412634 / 0.293841 (0.118793) | 0.031660 / 0.128546 (-0.096886) | 0.008699 / 0.075646 (-0.066947) | 0.070618 / 0.419271 (-0.348654) | 0.050814 / 0.043533 (0.007281) | 0.362320 / 0.255139 (0.107181) | 0.383863 / 0.283200 (0.100663) | 0.027980 / 0.141683 (-0.113703) | 1.486389 / 1.452155 (0.034234) | 1.595534 / 1.492716 (0.102817) |

### Benchmark: benchmark_getitem\_100B.json

| metric | get_batch_of\_1024\_random_rows | get_batch_of\_1024\_rows | get_first_row | get_last_row |
|--------|---|---|---|---|
| new / old (diff) | 0.300991 / 0.018006 (0.282985) | 0.565265 / 0.000490 (0.564775) | 0.000400 / 0.000200 (0.000200) | 0.000053 / 0.000054 (-0.000001) |

### Benchmark: benchmark_indices_mapping.json

| metric | select | shard | shuffle | sort | train_test_split |
|--------|---|---|---|---|---|
| new / old (diff) | 0.034942 / 0.037411 (-0.002470) | 0.092498 / 0.014526 (0.077972) | 0.106737 / 0.176557 (-0.069819) | 0.165400 / 0.737135 (-0.571735) | 0.107809 / 0.296338 (-0.188529) |

### Benchmark: benchmark_iterating.json

| metric | read 5000 | read 50000 | read_batch 50000 10 | read_batch 50000 100 | read_batch 50000 1000 | read_formatted numpy 5000 | read_formatted pandas 5000 | read_formatted tensorflow 5000 | read_formatted torch 5000 | read_formatted_batch numpy 5000 10 | read_formatted_batch numpy 5000 1000 | shuffled read 5000 | shuffled read 50000 | shuffled read_batch 50000 10 | shuffled read_batch 50000 100 | shuffled read_batch 50000 1000 | shuffled read_formatted numpy 5000 | shuffled read_formatted_batch numpy 5000 10 | shuffled read_formatted_batch numpy 5000 1000 |
|--------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 0.412156 / 0.215209 (0.196947) | 4.116747 / 2.077655 (2.039092) | 2.199612 / 1.504120 (0.695492) | 2.049310 / 1.541195 (0.508115) | 2.174342 / 1.468490 (0.705852) | 0.482794 / 4.584777 (-4.101983) | 3.561344 / 3.745712 (-0.184368) | 3.465935 / 5.269862 (-1.803926) | 2.076595 / 4.565676 (-2.489081) | 0.056242 / 0.424275 (-0.368033) | 0.007371 / 0.007607 (-0.000236) | 0.489135 / 0.226044 (0.263091) | 4.895691 / 2.268929 (2.626763) | 2.626936 / 55.444624 (-52.817688) | 2.306658 / 6.876477 (-4.569818) | 2.421705 / 2.142072 (0.279633) | 0.599547 / 4.805227 (-4.205680) | 0.133627 / 6.500664 (-6.367037) | 0.063830 / 0.075469 (-0.011639) |

### Benchmark: benchmark_map_filter.json

| metric | filter | map fast-tokenizer batched | map identity | map identity batched | map no-op batched | map no-op batched numpy | map no-op batched pandas | map no-op batched pytorch | map no-op batched tensorflow |
|--------|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 1.383039 / 1.841788 (-0.458748) | 21.005346 / 8.074308 (12.931038) | 14.911083 / 10.191392 (4.719691) | 0.190995 / 0.680424 (-0.489429) | 0.018510 / 0.534201 (-0.515691) | 0.396346 / 0.579283 (-0.182937) | 0.411496 / 0.434364 (-0.022868) | 0.470972 / 0.540337 (-0.069366) | 0.615670 / 1.386936 (-0.771266) |

</details>
</details>

![](https://cml.dev/watermark.png#d6d2ba47759d8acbf3d750b1cc4d89b195b1f9c9 "CML watermark")
<details>
<summary>Show benchmarks</summary>

PyArrow==8.0.0

<details>
<summary>Show updated benchmarks!</summary>

### Benchmark: benchmark_array_xd.json

| metric | read_batch_formatted_as_numpy after write_array2d | read_batch_formatted_as_numpy after write_flattened_sequence | read_batch_formatted_as_numpy after write_nested_sequence | read_batch_unformated after write_array2d | read_batch_unformated after write_flattened_sequence | read_batch_unformated after write_nested_sequence | read_col_formatted_as_numpy after write_array2d | read_col_formatted_as_numpy after write_flattened_sequence | read_col_formatted_as_numpy after write_nested_sequence | read_col_unformated after write_array2d | read_col_unformated after write_flattened_sequence | read_col_unformated after write_nested_sequence | read_formatted_as_numpy after write_array2d | read_formatted_as_numpy after write_flattened_sequence | read_formatted_as_numpy after write_nested_sequence | read_unformated after write_array2d | read_unformated after write_flattened_sequence | read_unformated after write_nested_sequence | write_array2d | write_flattened_sequence | write_nested_sequence |
|--------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 0.007249 / 0.011353 (-0.004104) | 0.004261 / 0.011008 (-0.006747) | 0.100645 / 0.038508 (0.062137) | 0.078522 / 0.023109 (0.055413) | 0.423526 / 0.275898 (0.147628) | 0.439541 / 0.323480 (0.116061) | 0.005812 / 0.007986 (-0.002173) | 0.003615 / 0.004328 (-0.000713) | 0.075908 / 0.004250 (0.071658) | 0.062490 / 0.037052 (0.025437) | 0.414941 / 0.258489 (0.156452) | 0.447267 / 0.293841 (0.153426) | 0.035127 / 0.128546 (-0.093419) | 0.009642 / 0.075646 (-0.066004) | 0.354093 / 0.419271 (-0.065179) | 0.060970 / 0.043533 (0.017437) | 0.418579 / 0.255139 (0.163440) | 0.427972 / 0.283200 (0.144772) | 0.025838 / 0.141683 (-0.115845) | 1.778349 / 1.452155 (0.326194) | 1.845965 / 1.492716 (0.353249) |

### Benchmark: benchmark_getitem\_100B.json

| metric | get_batch_of\_1024\_random_rows | get_batch_of\_1024\_rows | get_first_row | get_last_row |
|--------|---|---|---|---|
| new / old (diff) | 0.227304 / 0.018006 (0.209298) | 0.571833 / 0.000490 (0.571343) | 0.001328 / 0.000200 (0.001128) | 0.000071 / 0.000054 (0.000017) |

### Benchmark: benchmark_indices_mapping.json

| metric | select | shard | shuffle | sort | train_test_split |
|--------|---|---|---|---|---|
| new / old (diff) | 0.031343 / 0.037411 (-0.006068) | 0.096400 / 0.014526 (0.081875) | 0.106881 / 0.176557 (-0.069676) | 0.175449 / 0.737135 (-0.561686) | 0.108751 / 0.296338 (-0.187588) |

### Benchmark: benchmark_iterating.json

| metric | read 5000 | read 50000 | read_batch 50000 10 | read_batch 50000 100 | read_batch 50000 1000 | read_formatted numpy 5000 | read_formatted pandas 5000 | read_formatted tensorflow 5000 | read_formatted torch 5000 | read_formatted_batch numpy 5000 10 | read_formatted_batch numpy 5000 1000 | shuffled read 5000 | shuffled read 50000 | shuffled read_batch 50000 10 | shuffled read_batch 50000 100 | shuffled read_batch 50000 1000 | shuffled read_formatted numpy 5000 | shuffled read_formatted_batch numpy 5000 10 | shuffled read_formatted_batch numpy 5000 1000 |
|--------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 0.480204 / 0.215209 (0.264995) | 4.622063 / 2.077655 (2.544408) | 2.211505 / 1.504120 (0.707385) | 2.065154 / 1.541195 (0.523959) | 2.159446 / 1.468490 (0.690956) | 0.584571 / 4.584777 (-4.000206) | 4.392449 / 3.745712 (0.646737) | 4.790166 / 5.269862 (-0.479695) | 2.840615 / 4.565676 (-1.725062) | 0.070845 / 0.424275 (-0.353430) | 0.009112 / 0.007607 (0.001505) | 0.580251 / 0.226044 (0.354207) | 5.660311 / 2.268929 (3.391382) | 2.836136 / 55.444624 (-52.608489) | 2.412859 / 6.876477 (-4.463618) | 2.556710 / 2.142072 (0.414637) | 0.691946 / 4.805227 (-4.113282) | 0.160123 / 6.500664 (-6.340541) | 0.072593 / 0.075469 (-0.002876) |

### Benchmark: benchmark_map_filter.json

| metric | filter | map fast-tokenizer batched | map identity | map identity batched | map no-op batched | map no-op batched numpy | map no-op batched pandas | map no-op batched pytorch | map no-op batched tensorflow |
|--------|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 1.547339 / 1.841788 (-0.294448) | 21.724793 / 8.074308 (13.650485) | 16.315304 / 10.191392 (6.123912) | 0.188733 / 0.680424 (-0.491690) | 0.022109 / 0.534201 (-0.512092) | 0.481623 / 0.579283 (-0.097660) | 0.464316 / 0.434364 (0.029952) | 0.557953 / 0.540337 (0.017615) | 0.756023 / 1.386936 (-0.630913) |

</details>
PyArrow==latest

<details>
<summary>Show updated benchmarks!</summary>

### Benchmark: benchmark_array_xd.json

| metric | read_batch_formatted_as_numpy after write_array2d | read_batch_formatted_as_numpy after write_flattened_sequence | read_batch_formatted_as_numpy after write_nested_sequence | read_batch_unformated after write_array2d | read_batch_unformated after write_flattened_sequence | read_batch_unformated after write_nested_sequence | read_col_formatted_as_numpy after write_array2d | read_col_formatted_as_numpy after write_flattened_sequence | read_col_formatted_as_numpy after write_nested_sequence | read_col_unformated after write_array2d | read_col_unformated after write_flattened_sequence | read_col_unformated after write_nested_sequence | read_formatted_as_numpy after write_array2d | read_formatted_as_numpy after write_flattened_sequence | read_formatted_as_numpy after write_nested_sequence | read_unformated after write_array2d | read_unformated after write_flattened_sequence | read_unformated after write_nested_sequence | write_array2d | write_flattened_sequence | write_nested_sequence |
|--------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 0.008637 / 0.011353 (-0.002716) | 0.005286 / 0.011008 (-0.005723) | 0.091387 / 0.038508 (0.052879) | 0.114092 / 0.023109 (0.090983) | 0.457547 / 0.275898 (0.181649) | 0.506878 / 0.323480 (0.183398) | 0.006849 / 0.007986 (-0.001137) | 0.004255 / 0.004328 (-0.000073) | 0.079556 / 0.004250 (0.075306) | 0.077729 / 0.037052 (0.040677) | 0.454094 / 0.258489 (0.195605) | 0.515812 / 0.293841 (0.221971) | 0.038271 / 0.128546 (-0.090275) | 0.010110 / 0.075646 (-0.065536) | 0.094254 / 0.419271 (-0.325017) | 0.065392 / 0.043533 (0.021860) | 0.459749 / 0.255139 (0.204610) | 0.489829 / 0.283200 (0.206629) | 0.040393 / 0.141683 (-0.101290) | 1.810414 / 1.452155 (0.358259) | 1.913212 / 1.492716 (0.420496) |

### Benchmark: benchmark_getitem\_100B.json

| metric | get_batch_of\_1024\_random_rows | get_batch_of\_1024\_rows | get_first_row | get_last_row |
|--------|---|---|---|---|
| new / old (diff) | 0.236898 / 0.018006 (0.218891) | 0.513118 / 0.000490 (0.512628) | 0.004432 / 0.000200 (0.004232) | 0.000115 / 0.000054 (0.000060) |

### Benchmark: benchmark_indices_mapping.json

| metric | select | shard | shuffle | sort | train_test_split |
|--------|---|---|---|---|---|
| new / old (diff) | 0.035074 / 0.037411 (-0.002337) | 0.102384 / 0.014526 (0.087858) | 0.117326 / 0.176557 (-0.059231) | 0.182596 / 0.737135 (-0.554539) | 0.116384 / 0.296338 (-0.179955) |

### Benchmark: benchmark_iterating.json

| metric | read 5000 | read 50000 | read_batch 50000 10 | read_batch 50000 100 | read_batch 50000 1000 | read_formatted numpy 5000 | read_formatted pandas 5000 | read_formatted tensorflow 5000 | read_formatted torch 5000 | read_formatted_batch numpy 5000 10 | read_formatted_batch numpy 5000 1000 | shuffled read 5000 | shuffled read 50000 | shuffled read_batch 50000 10 | shuffled read_batch 50000 100 | shuffled read_batch 50000 1000 | shuffled read_formatted numpy 5000 | shuffled read_formatted_batch numpy 5000 10 | shuffled read_formatted_batch numpy 5000 1000 |
|--------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 0.514544 / 0.215209 (0.299335) | 5.152930 / 2.077655 (3.075275) | 2.624477 / 1.504120 (1.120357) | 2.363209 / 1.541195 (0.822014) | 2.436060 / 1.468490 (0.967570) | 0.592523 / 4.584777 (-3.992254) | 4.209668 / 3.745712 (0.463956) | 6.284372 / 5.269862 (1.014511) | 3.667303 / 4.565676 (-0.898374) | 0.067017 / 0.424275 (-0.357259) | 0.008607 / 0.007607 (0.001000) | 0.600840 / 0.226044 (0.374796) | 5.992630 / 2.268929 (3.723701) | 3.114532 / 55.444624 (-52.330093) | 2.693242 / 6.876477 (-4.183235) | 2.767187 / 2.142072 (0.625115) | 0.687591 / 4.805227 (-4.117636) | 0.158477 / 6.500664 (-6.342187) | 0.075504 / 0.075469 (0.000034) |

### Benchmark: benchmark_map_filter.json

| metric | filter | map fast-tokenizer batched | map identity | map identity batched | map no-op batched | map no-op batched numpy | map no-op batched pandas | map no-op batched pytorch | map no-op batched tensorflow |
|--------|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 1.605039 / 1.841788 (-0.236749) | 21.524730 / 8.074308 (13.450422) | 17.014643 / 10.191392 (6.823251) | 0.201580 / 0.680424 (-0.478843) | 0.023028 / 0.534201 (-0.511173) | 0.483801 / 0.579283 (-0.095482) | 0.490221 / 0.434364 (0.055857) | 0.589292 / 0.540337 (0.048955) | 0.758532 / 1.386936 (-0.628404) |

</details>
</details>

![](https://cml.dev/watermark.png#8c9c24d1d90f0c2db043ae2bc39f7c292454a58c "CML watermark")
<details>
<summary>Show benchmarks</summary>

PyArrow==8.0.0

<details>
<summary>Show updated benchmarks!</summary>

### Benchmark: benchmark_array_xd.json

| metric | read_batch_formatted_as_numpy after write_array2d | read_batch_formatted_as_numpy after write_flattened_sequence | read_batch_formatted_as_numpy after write_nested_sequence | read_batch_unformated after write_array2d | read_batch_unformated after write_flattened_sequence | read_batch_unformated after write_nested_sequence | read_col_formatted_as_numpy after write_array2d | read_col_formatted_as_numpy after write_flattened_sequence | read_col_formatted_as_numpy after write_nested_sequence | read_col_unformated after write_array2d | read_col_unformated after write_flattened_sequence | read_col_unformated after write_nested_sequence | read_formatted_as_numpy after write_array2d | read_formatted_as_numpy after write_flattened_sequence | read_formatted_as_numpy after write_nested_sequence | read_unformated after write_array2d | read_unformated after write_flattened_sequence | read_unformated after write_nested_sequence | write_array2d | write_flattened_sequence | write_nested_sequence |
|--------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 0.008080 / 0.011353 (-0.003273) | 0.004859 / 0.011008 (-0.006149) | 0.101895 / 0.038508 (0.063387) | 0.091168 / 0.023109 (0.068059) | 0.378914 / 0.275898 (0.103016) | 0.417172 / 0.323480 (0.093692) | 0.006314 / 0.007986 (-0.001672) | 0.004069 / 0.004328 (-0.000259) | 0.076566 / 0.004250 (0.072315) | 0.070986 / 0.037052 (0.033934) | 0.380935 / 0.258489 (0.122446) | 0.417131 / 0.293841 (0.123290) | 0.036343 / 0.128546 (-0.092203) | 0.009996 / 0.075646 (-0.065650) | 0.346386 / 0.419271 (-0.072886) | 0.063162 / 0.043533 (0.019630) | 0.372620 / 0.255139 (0.117481) | 0.404902 / 0.283200 (0.121702) | 0.028217 / 0.141683 (-0.113466) | 1.793875 / 1.452155 (0.341721) | 1.836284 / 1.492716 (0.343568) |

### Benchmark: benchmark_getitem\_100B.json

| metric | get_batch_of\_1024\_random_rows | get_batch_of\_1024\_rows | get_first_row | get_last_row |
|--------|---|---|---|---|
| new / old (diff) | 0.223830 / 0.018006 (0.205823) | 0.503643 / 0.000490 (0.503153) | 0.004957 / 0.000200 (0.004757) | 0.000107 / 0.000054 (0.000053) |

### Benchmark: benchmark_indices_mapping.json

| metric | select | shard | shuffle | sort | train_test_split |
|--------|---|---|---|---|---|
| new / old (diff) | 0.035455 / 0.037411 (-0.001957) | 0.108015 / 0.014526 (0.093489) | 0.116887 / 0.176557 (-0.059669) | 0.188174 / 0.737135 (-0.548961) | 0.117217 / 0.296338 (-0.179121) |

### Benchmark: benchmark_iterating.json

| metric | read 5000 | read 50000 | read_batch 50000 10 | read_batch 50000 100 | read_batch 50000 1000 | read_formatted numpy 5000 | read_formatted pandas 5000 | read_formatted tensorflow 5000 | read_formatted torch 5000 | read_formatted_batch numpy 5000 10 | read_formatted_batch numpy 5000 1000 | shuffled read 5000 | shuffled read 50000 | shuffled read_batch 50000 10 | shuffled read_batch 50000 100 | shuffled read_batch 50000 1000 | shuffled read_formatted numpy 5000 | shuffled read_formatted_batch numpy 5000 10 | shuffled read_formatted_batch numpy 5000 1000 |
|--------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 0.471681 / 0.215209 (0.256472) | 4.694509 / 2.077655 (2.616855) | 2.369539 / 1.504120 (0.865419) | 2.176839 / 1.541195 (0.635644) | 2.300536 / 1.468490 (0.832045) | 0.575689 / 4.584777 (-4.009088) | 4.232765 / 3.745712 (0.487053) | 4.766775 / 5.269862 (-0.503087) | 2.864667 / 4.565676 (-1.701010) | 0.069390 / 0.424275 (-0.354885) | 0.008822 / 0.007607 (0.001214) | 0.559620 / 0.226044 (0.333576) | 5.580401 / 2.268929 (3.311472) | 2.920293 / 55.444624 (-52.524331) | 2.552166 / 6.876477 (-4.324311) | 2.795890 / 2.142072 (0.653818) | 0.687863 / 4.805227 (-4.117364) | 0.159129 / 6.500664 (-6.341535) | 0.073475 / 0.075469 (-0.001994) |

### Benchmark: benchmark_map_filter.json

| metric | filter | map fast-tokenizer batched | map identity | map identity batched | map no-op batched | map no-op batched numpy | map no-op batched pandas | map no-op batched pytorch | map no-op batched tensorflow |
|--------|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 1.505892 / 1.841788 (-0.335896) | 24.127650 / 8.074308 (16.053342) | 16.758238 / 10.191392 (6.566846) | 0.200555 / 0.680424 (-0.479869) | 0.021596 / 0.534201 (-0.512605) | 0.480668 / 0.579283 (-0.098615) | 0.483528 / 0.434364 (0.049164) | 0.571241 / 0.540337 (0.030903) | 0.790547 / 1.386936 (-0.596390) |

</details>
PyArrow==latest

<details>
<summary>Show updated benchmarks!</summary>

### Benchmark: benchmark_array_xd.json

| metric | read_batch_formatted_as_numpy after write_array2d | read_batch_formatted_as_numpy after write_flattened_sequence | read_batch_formatted_as_numpy after write_nested_sequence | read_batch_unformated after write_array2d | read_batch_unformated after write_flattened_sequence | read_batch_unformated after write_nested_sequence | read_col_formatted_as_numpy after write_array2d | read_col_formatted_as_numpy after write_flattened_sequence | read_col_formatted_as_numpy after write_nested_sequence | read_col_unformated after write_array2d | read_col_unformated after write_flattened_sequence | read_col_unformated after write_nested_sequence | read_formatted_as_numpy after write_array2d | read_formatted_as_numpy after write_flattened_sequence | read_formatted_as_numpy after write_nested_sequence | read_unformated after write_array2d | read_unformated after write_flattened_sequence | read_unformated after write_nested_sequence | write_array2d | write_flattened_sequence | write_nested_sequence |
|--------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 0.007997 / 0.011353 (-0.003356) | 0.004842 / 0.011008 (-0.006166) | 0.077190 / 0.038508 (0.038681) | 0.092765 / 0.023109 (0.069656) | 0.457475 / 0.275898 (0.181577) | 0.523914 / 0.323480 (0.200434) | 0.006349 / 0.007986 (-0.001637) | 0.003902 / 0.004328 (-0.000427) | 0.075860 / 0.004250 (0.071609) | 0.069708 / 0.037052 (0.032656) | 0.459612 / 0.258489 (0.201123) | 0.555028 / 0.293841 (0.261187) | 0.036854 / 0.128546 (-0.091692) | 0.010078 / 0.075646 (-0.065568) | 0.083871 / 0.419271 (-0.335400) | 0.061221 / 0.043533 (0.017689) | 0.435737 / 0.255139 (0.180598) | 0.509700 / 0.283200 (0.226500) | 0.038091 / 0.141683 (-0.103592) | 1.777161 / 1.452155 (0.325006) | 1.859603 / 1.492716 (0.366886) |

### Benchmark: benchmark_getitem\_100B.json

| metric | get_batch_of\_1024\_random_rows | get_batch_of\_1024\_rows | get_first_row | get_last_row |
|--------|---|---|---|---|
| new / old (diff) | 0.250020 / 0.018006 (0.232014) | 0.486198 / 0.000490 (0.485708) | 0.007080 / 0.000200 (0.006880) | 0.000114 / 0.000054 (0.000060) |

### Benchmark: benchmark_indices_mapping.json

| metric | select | shard | shuffle | sort | train_test_split |
|--------|---|---|---|---|---|
| new / old (diff) | 0.038163 / 0.037411 (0.000751) | 0.110812 / 0.014526 (0.096286) | 0.122489 / 0.176557 (-0.054068) | 0.188215 / 0.737135 (-0.548920) | 0.122375 / 0.296338 (-0.173963) |

### Benchmark: benchmark_iterating.json

| metric | read 5000 | read 50000 | read_batch 50000 10 | read_batch 50000 100 | read_batch 50000 1000 | read_formatted numpy 5000 | read_formatted pandas 5000 | read_formatted tensorflow 5000 | read_formatted torch 5000 | read_formatted_batch numpy 5000 10 | read_formatted_batch numpy 5000 1000 | shuffled read 5000 | shuffled read 50000 | shuffled read_batch 50000 10 | shuffled read_batch 50000 100 | shuffled read_batch 50000 1000 | shuffled read_formatted numpy 5000 | shuffled read_formatted_batch numpy 5000 10 | shuffled read_formatted_batch numpy 5000 1000 |
|--------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 0.484534 / 0.215209 (0.269325) | 4.828654 / 2.077655 (2.751000) | 2.545102 / 1.504120 (1.040982) | 2.368867 / 1.541195 (0.827672) | 2.458042 / 1.468490 (0.989552) | 0.576372 / 4.584777 (-4.008404) | 4.814033 / 3.745712 (1.068321) | 6.175972 / 5.269862 (0.906110) | 4.033422 / 4.565676 (-0.532254) | 0.068544 / 0.424275 (-0.355731) | 0.008906 / 0.007607 (0.001299) | 0.581767 / 0.226044 (0.355723) | 5.808623 / 2.268929 (3.539695) | 3.120312 / 55.444624 (-52.324313) | 2.774834 / 6.876477 (-4.101642) | 2.770413 / 2.142072 (0.628340) | 0.692715 / 4.805227 (-4.112512) | 0.158883 / 6.500664 (-6.341782) | 0.075894 / 0.075469 (0.000425) |

### Benchmark: benchmark_map_filter.json

| metric | filter | map fast-tokenizer batched | map identity | map identity batched | map no-op batched | map no-op batched numpy | map no-op batched pandas | map no-op batched pytorch | map no-op batched tensorflow |
|--------|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 1.631250 / 1.841788 (-0.210538) | 24.693250 / 8.074308 (16.618942) | 17.434790 / 10.191392 (7.243398) | 0.196456 / 0.680424 (-0.483968) | 0.022505 / 0.534201 (-0.511696) | 0.474788 / 0.579283 (-0.104495) | 0.500947 / 0.434364 (0.066583) | 0.553596 / 0.540337 (0.013259) | 0.737767 / 1.386936 (-0.649169) |

</details>
</details>

![](https://cml.dev/watermark.png#f87d6e6394bf4b390ccc82235eb7667f874e5d43 "CML watermark")
<details>
<summary>Show benchmarks</summary>

PyArrow==8.0.0

<details>
<summary>Show updated benchmarks!</summary>

### Benchmark: benchmark_array_xd.json

| metric | read_batch_formatted_as_numpy after write_array2d | read_batch_formatted_as_numpy after write_flattened_sequence | read_batch_formatted_as_numpy after write_nested_sequence | read_batch_unformated after write_array2d | read_batch_unformated after write_flattened_sequence | read_batch_unformated after write_nested_sequence | read_col_formatted_as_numpy after write_array2d | read_col_formatted_as_numpy after write_flattened_sequence | read_col_formatted_as_numpy after write_nested_sequence | read_col_unformated after write_array2d | read_col_unformated after write_flattened_sequence | read_col_unformated after write_nested_sequence | read_formatted_as_numpy after write_array2d | read_formatted_as_numpy after write_flattened_sequence | read_formatted_as_numpy after write_nested_sequence | read_unformated after write_array2d | read_unformated after write_flattened_sequence | read_unformated after write_nested_sequence | write_array2d | write_flattened_sequence | write_nested_sequence |
|--------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 0.006629 / 0.011353 (-0.004724) | 0.004115 / 0.011008 (-0.006894) | 0.083934 / 0.038508 (0.045426) | 0.074952 / 0.023109 (0.051843) | 0.313069 / 0.275898 (0.037171) | 0.345878 / 0.323480 (0.022398) | 0.006034 / 0.007986 (-0.001952) | 0.003413 / 0.004328 (-0.000916) | 0.065130 / 0.004250 (0.060880) | 0.057363 / 0.037052 (0.020310) | 0.314483 / 0.258489 (0.055994) | 0.352626 / 0.293841 (0.058785) | 0.031325 / 0.128546 (-0.097221) | 0.008577 / 0.075646 (-0.067069) | 0.288137 / 0.419271 (-0.131135) | 0.053651 / 0.043533 (0.010118) | 0.313006 / 0.255139 (0.057867) | 0.338668 / 0.283200 (0.055468) | 0.023709 / 0.141683 (-0.117974) | 1.481209 / 1.452155 (0.029054) | 1.559801 / 1.492716 (0.067085) |

### Benchmark: benchmark_getitem\_100B.json

| metric | get_batch_of\_1024\_random_rows | get_batch_of\_1024\_rows | get_first_row | get_last_row |
|--------|---|---|---|---|
| new / old (diff) | 0.211543 / 0.018006 (0.193537) | 0.452185 / 0.000490 (0.451696) | 0.003177 / 0.000200 (0.002977) | 0.000078 / 0.000054 (0.000024) |

### Benchmark: benchmark_indices_mapping.json

| metric | select | shard | shuffle | sort | train_test_split |
|--------|---|---|---|---|---|
| new / old (diff) | 0.028821 / 0.037411 (-0.008591) | 0.083290 / 0.014526 (0.068765) | 0.097478 / 0.176557 (-0.079079) | 0.153506 / 0.737135 (-0.583629) | 0.097054 / 0.296338 (-0.199284) |

### Benchmark: benchmark_iterating.json

| metric | read 5000 | read 50000 | read_batch 50000 10 | read_batch 50000 100 | read_batch 50000 1000 | read_formatted numpy 5000 | read_formatted pandas 5000 | read_formatted tensorflow 5000 | read_formatted torch 5000 | read_formatted_batch numpy 5000 10 | read_formatted_batch numpy 5000 1000 | shuffled read 5000 | shuffled read 50000 | shuffled read_batch 50000 10 | shuffled read_batch 50000 100 | shuffled read_batch 50000 1000 | shuffled read_formatted numpy 5000 | shuffled read_formatted_batch numpy 5000 10 | shuffled read_formatted_batch numpy 5000 1000 |
|--------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 0.385847 / 0.215209 (0.170638) | 3.835629 / 2.077655 (1.757974) | 1.880938 / 1.504120 (0.376819) | 1.711848 / 1.541195 (0.170653) | 1.785099 / 1.468490 (0.316609) | 0.486256 / 4.584777 (-4.098521) | 3.629026 / 3.745712 (-0.116686) | 3.321578 / 5.269862 (-1.948283) | 2.024314 / 4.565676 (-2.541363) | 0.058097 / 0.424275 (-0.366179) | 0.007724 / 0.007607 (0.000117) | 0.458293 / 0.226044 (0.232249) | 4.581314 / 2.268929 (2.312386) | 2.314379 / 55.444624 (-53.130246) | 1.966089 / 6.876477 (-4.910387) | 2.203824 / 2.142072 (0.061752) | 0.611581 / 4.805227 (-4.193647) | 0.149166 / 6.500664 (-6.351498) | 0.059825 / 0.075469 (-0.015644) |

### Benchmark: benchmark_map_filter.json

| metric | filter | map fast-tokenizer batched | map identity | map identity batched | map no-op batched | map no-op batched numpy | map no-op batched pandas | map no-op batched pytorch | map no-op batched tensorflow |
|--------|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 1.235546 / 1.841788 (-0.606242) | 19.747439 / 8.074308 (11.673131) | 14.628383 / 10.191392 (4.436991) | 0.193074 / 0.680424 (-0.487350) | 0.020327 / 0.534201 (-0.513874) | 0.397051 / 0.579283 (-0.182232) | 0.418491 / 0.434364 (-0.015873) | 0.462055 / 0.540337 (-0.078282) | 0.637524 / 1.386936 (-0.749412) |

</details>
PyArrow==latest

<details>
<summary>Show updated benchmarks!</summary>

### Benchmark: benchmark_array_xd.json

| metric | read_batch_formatted_as_numpy after write_array2d | read_batch_formatted_as_numpy after write_flattened_sequence | read_batch_formatted_as_numpy after write_nested_sequence | read_batch_unformated after write_array2d | read_batch_unformated after write_flattened_sequence | read_batch_unformated after write_nested_sequence | read_col_formatted_as_numpy after write_array2d | read_col_formatted_as_numpy after write_flattened_sequence | read_col_formatted_as_numpy after write_nested_sequence | read_col_unformated after write_array2d | read_col_unformated after write_flattened_sequence | read_col_unformated after write_nested_sequence | read_formatted_as_numpy after write_array2d | read_formatted_as_numpy after write_flattened_sequence | read_formatted_as_numpy after write_nested_sequence | read_unformated after write_array2d | read_unformated after write_flattened_sequence | read_unformated after write_nested_sequence | write_array2d | write_flattened_sequence | write_nested_sequence |
|--------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 0.007069 / 0.011353 (-0.004284) | 0.004106 / 0.011008 (-0.006902) | 0.065818 / 0.038508 (0.027310) | 0.077101 / 0.023109 (0.053991) | 0.363323 / 0.275898 (0.087425) | 0.399463 / 0.323480 (0.075983) | 0.005540 / 0.007986 (-0.002446) | 0.003480 / 0.004328 (-0.000849) | 0.065176 / 0.004250 (0.060926) | 0.060867 / 0.037052 (0.023815) | 0.365763 / 0.258489 (0.107273) | 0.407789 / 0.293841 (0.113949) | 0.032018 / 0.128546 (-0.096528) | 0.008550 / 0.075646 (-0.067096) | 0.071750 / 0.419271 (-0.347521) | 0.050625 / 0.043533 (0.007092) | 0.361434 / 0.255139 (0.106295) | 0.384799 / 0.283200 (0.101599) | 0.026104 / 0.141683 (-0.115579) | 1.496093 / 1.452155 (0.043938) | 1.592909 / 1.492716 (0.100193) |

### Benchmark: benchmark_getitem\_100B.json

| metric | get_batch_of\_1024\_random_rows | get_batch_of\_1024\_rows | get_first_row | get_last_row |
|--------|---|---|---|---|
| new / old (diff) | 0.185794 / 0.018006 (0.167787) | 0.453379 / 0.000490 (0.452890) | 0.004365 / 0.000200 (0.004165) | 0.000092 / 0.000054 (0.000038) |

### Benchmark: benchmark_indices_mapping.json

| metric | select | shard | shuffle | sort | train_test_split |
|--------|---|---|---|---|---|
| new / old (diff) | 0.031666 / 0.037411 (-0.005746) | 0.088323 / 0.014526 (0.073798) | 0.104602 / 0.176557 (-0.071954) | 0.159827 / 0.737135 (-0.577308) | 0.103725 / 0.296338 (-0.192614) |

### Benchmark: benchmark_iterating.json

| metric | read 5000 | read 50000 | read_batch 50000 10 | read_batch 50000 100 | read_batch 50000 1000 | read_formatted numpy 5000 | read_formatted pandas 5000 | read_formatted tensorflow 5000 | read_formatted torch 5000 | read_formatted_batch numpy 5000 10 | read_formatted_batch numpy 5000 1000 | shuffled read 5000 | shuffled read 50000 | shuffled read_batch 50000 10 | shuffled read_batch 50000 100 | shuffled read_batch 50000 1000 | shuffled read_formatted numpy 5000 | shuffled read_formatted_batch numpy 5000 10 | shuffled read_formatted_batch numpy 5000 1000 |
|--------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 0.413509 / 0.215209 (0.198300) | 4.126071 / 2.077655 (2.048416) | 2.137088 / 1.504120 (0.632968) | 1.981034 / 1.541195 (0.439839) | 2.063660 / 1.468490 (0.595170) | 0.478798 / 4.584777 (-4.105979) | 3.642801 / 3.745712 (-0.102911) | 3.428994 / 5.269862 (-1.840867) | 2.031902 / 4.565676 (-2.533774) | 0.056244 / 0.424275 (-0.368032) | 0.007365 / 0.007607 (-0.000242) | 0.484371 / 0.226044 (0.258327) | 4.838537 / 2.268929 (2.569608) | 2.559497 / 55.444624 (-52.885127) | 2.251863 / 6.876477 (-4.624614) | 2.339227 / 2.142072 (0.197155) | 0.607228 / 4.805227 (-4.198000) | 0.133877 / 6.500664 (-6.366787) | 0.062049 / 0.075469 (-0.013420) |

### Benchmark: benchmark_map_filter.json

| metric | filter | map fast-tokenizer batched | map identity | map identity batched | map no-op batched | map no-op batched numpy | map no-op batched pandas | map no-op batched pytorch | map no-op batched tensorflow |
|--------|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 1.350389 / 1.841788 (-0.491399) | 20.060359 / 8.074308 (11.986051) | 14.305675 / 10.191392 (4.114283) | 0.165642 / 0.680424 (-0.514782) | 0.018206 / 0.534201 (-0.515994) | 0.396907 / 0.579283 (-0.182376) | 0.431896 / 0.434364 (-0.002468) | 0.475778 / 0.540337 (-0.064559) | 0.644688 / 1.386936 (-0.742248) |

</details>
</details>

![](https://cml.dev/watermark.png#8f6fa96ae5de873a49ef28739e8f64edf8b18cae "CML watermark")
<details>
<summary>Show benchmarks</summary>

PyArrow==8.0.0

<details>
<summary>Show updated benchmarks!</summary>

### Benchmark: benchmark_array_xd.json

| metric | read_batch_formatted_as_numpy after write_array2d | read_batch_formatted_as_numpy after write_flattened_sequence | read_batch_formatted_as_numpy after write_nested_sequence | read_batch_unformated after write_array2d | read_batch_unformated after write_flattened_sequence | read_batch_unformated after write_nested_sequence | read_col_formatted_as_numpy after write_array2d | read_col_formatted_as_numpy after write_flattened_sequence | read_col_formatted_as_numpy after write_nested_sequence | read_col_unformated after write_array2d | read_col_unformated after write_flattened_sequence | read_col_unformated after write_nested_sequence | read_formatted_as_numpy after write_array2d | read_formatted_as_numpy after write_flattened_sequence | read_formatted_as_numpy after write_nested_sequence | read_unformated after write_array2d | read_unformated after write_flattened_sequence | read_unformated after write_nested_sequence | write_array2d | write_flattened_sequence | write_nested_sequence |
|--------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 0.009048 / 0.011353 (-0.002305) | 0.005787 / 0.011008 (-0.005221) | 0.111617 / 0.038508 (0.073109) | 0.087603 / 0.023109 (0.064494) | 0.446481 / 0.275898 (0.170583) | 0.491726 / 0.323480 (0.168247) | 0.007052 / 0.007986 (-0.000934) | 0.004481 / 0.004328 (0.000152) | 0.084331 / 0.004250 (0.080081) | 0.072006 / 0.037052 (0.034953) | 0.454238 / 0.258489 (0.195749) | 0.496749 / 0.293841 (0.202908) | 0.049027 / 0.128546 (-0.079520) | 0.014005 / 0.075646 (-0.061641) | 0.372550 / 0.419271 (-0.046722) | 0.071414 / 0.043533 (0.027881) | 0.459432 / 0.255139 (0.204293) | 0.467332 / 0.283200 (0.184133) | 0.037539 / 0.141683 (-0.104144) | 1.869179 / 1.452155 (0.417024) | 1.983641 / 1.492716 (0.490925) |

### Benchmark: benchmark_getitem\_100B.json

| metric | get_batch_of\_1024\_random_rows | get_batch_of\_1024\_rows | get_first_row | get_last_row |
|--------|---|---|---|---|
| new / old (diff) | 0.265426 / 0.018006 (0.247419) | 0.672527 / 0.000490 (0.672037) | 0.001152 / 0.000200 (0.000953) | 0.000181 / 0.000054 (0.000127) |

### Benchmark: benchmark_indices_mapping.json

| metric | select | shard | shuffle | sort | train_test_split |
|--------|---|---|---|---|---|
| new / old (diff) | 0.032967 / 0.037411 (-0.004445) | 0.103023 / 0.014526 (0.088497) | 0.115978 / 0.176557 (-0.060578) | 0.191698 / 0.737135 (-0.545438) | 0.117867 / 0.296338 (-0.178471) |

### Benchmark: benchmark_iterating.json

| metric | read 5000 | read 50000 | read_batch 50000 10 | read_batch 50000 100 | read_batch 50000 1000 | read_formatted numpy 5000 | read_formatted pandas 5000 | read_formatted tensorflow 5000 | read_formatted torch 5000 | read_formatted_batch numpy 5000 10 | read_formatted_batch numpy 5000 1000 | shuffled read 5000 | shuffled read 50000 | shuffled read_batch 50000 10 | shuffled read_batch 50000 100 | shuffled read_batch 50000 1000 | shuffled read_formatted numpy 5000 | shuffled read_formatted_batch numpy 5000 10 | shuffled read_formatted_batch numpy 5000 1000 |
|--------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 0.602208 / 0.215209 (0.386999) | 6.147784 / 2.077655 (4.070129) | 2.768933 / 1.504120 (1.264813) | 2.415619 / 1.541195 (0.874424) | 2.456159 / 1.468490 (0.987669) | 0.836270 / 4.584777 (-3.748507) | 5.447754 / 3.745712 (1.702042) | 7.751825 / 5.269862 (2.481963) | 4.591892 / 4.565676 (0.026215) | 0.108269 / 0.424275 (-0.316006) | 0.009626 / 0.007607 (0.002019) | 0.719260 / 0.226044 (0.493216) | 7.313442 / 2.268929 (5.044514) | 3.490739 / 55.444624 (-51.953885) | 2.743543 / 6.876477 (-4.132934) | 3.035071 / 2.142072 (0.892999) | 1.042791 / 4.805227 (-3.762436) | 0.217080 / 6.500664 (-6.283584) | 0.084286 / 0.075469 (0.008817) |

### Benchmark: benchmark_map_filter.json

| metric | filter | map fast-tokenizer batched | map identity | map identity batched | map no-op batched | map no-op batched numpy | map no-op batched pandas | map no-op batched pytorch | map no-op batched tensorflow |
|--------|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 1.655427 / 1.841788 (-0.186361) | 25.386536 / 8.074308 (17.312228) | 21.740666 / 10.191392 (11.549274) | 0.246388 / 0.680424 (-0.434036) | 0.029723 / 0.534201 (-0.504478) | 0.491537 / 0.579283 (-0.087746) | 0.603495 / 0.434364 (0.169131) | 0.573938 / 0.540337 (0.033600) | 0.981875 / 1.386936 (-0.405061) |

</details>
PyArrow==latest

<details>
<summary>Show updated benchmarks!</summary>

### Benchmark: benchmark_array_xd.json

| metric | read_batch_formatted_as_numpy after write_array2d | read_batch_formatted_as_numpy after write_flattened_sequence | read_batch_formatted_as_numpy after write_nested_sequence | read_batch_unformated after write_array2d | read_batch_unformated after write_flattened_sequence | read_batch_unformated after write_nested_sequence | read_col_formatted_as_numpy after write_array2d | read_col_formatted_as_numpy after write_flattened_sequence | read_col_formatted_as_numpy after write_nested_sequence | read_col_unformated after write_array2d | read_col_unformated after write_flattened_sequence | read_col_unformated after write_nested_sequence | read_formatted_as_numpy after write_array2d | read_formatted_as_numpy after write_flattened_sequence | read_formatted_as_numpy after write_nested_sequence | read_unformated after write_array2d | read_unformated after write_flattened_sequence | read_unformated after write_nested_sequence | write_array2d | write_flattened_sequence | write_nested_sequence |
|--------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 0.009664 / 0.011353 (-0.001689) | 0.006446 / 0.011008 (-0.004562) | 0.085113 / 0.038508 (0.046605) | 0.094533 / 0.023109 (0.071424) | 0.498388 / 0.275898 (0.222490) | 0.540127 / 0.323480 (0.216647) | 0.007316 / 0.007986 (-0.000670) | 0.004252 / 0.004328 (-0.000077) | 0.086292 / 0.004250 (0.082041) | 0.067956 / 0.037052 (0.030903) | 0.507664 / 0.258489 (0.249175) | 0.554324 / 0.293841 (0.260483) | 0.050107 / 0.128546 (-0.078439) | 0.014277 / 0.075646 (-0.061370) | 0.098838 / 0.419271 (-0.320433) | 0.066053 / 0.043533 (0.022521) | 0.491090 / 0.255139 (0.235951) | 0.537432 / 0.283200 (0.254232) | 0.035937 / 0.141683 (-0.105746) | 1.820715 / 1.452155 (0.368561) | 1.996268 / 1.492716 (0.503552) |

### Benchmark: benchmark_getitem\_100B.json

| metric | get_batch_of\_1024\_random_rows | get_batch_of\_1024\_rows | get_first_row | get_last_row |
|--------|---|---|---|---|
| new / old (diff) | 0.300859 / 0.018006 (0.282852) | 0.610958 / 0.000490 (0.610468) | 0.000474 / 0.000200 (0.000274) | 0.000098 / 0.000054 (0.000044) |

### Benchmark: benchmark_indices_mapping.json

| metric | select | shard | shuffle | sort | train_test_split |
|--------|---|---|---|---|---|
| new / old (diff) | 0.036372 / 0.037411 (-0.001039) | 0.109115 / 0.014526 (0.094589) | 0.122802 / 0.176557 (-0.053755) | 0.187092 / 0.737135 (-0.550044) | 0.123432 / 0.296338 (-0.172906) |

### Benchmark: benchmark_iterating.json

| metric | read 5000 | read 50000 | read_batch 50000 10 | read_batch 50000 100 | read_batch 50000 1000 | read_formatted numpy 5000 | read_formatted pandas 5000 | read_formatted tensorflow 5000 | read_formatted torch 5000 | read_formatted_batch numpy 5000 10 | read_formatted_batch numpy 5000 1000 | shuffled read 5000 | shuffled read 50000 | shuffled read_batch 50000 10 | shuffled read_batch 50000 100 | shuffled read_batch 50000 1000 | shuffled read_formatted numpy 5000 | shuffled read_formatted_batch numpy 5000 10 | shuffled read_formatted_batch numpy 5000 1000 |
|--------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 0.646979 / 0.215209 (0.431770) | 6.577713 / 2.077655 (4.500058) | 3.004606 / 1.504120 (1.500486) | 2.661183 / 1.541195 (1.119989) | 2.726717 / 1.468490 (1.258227) | 0.889497 / 4.584777 (-3.695280) | 5.485055 / 3.745712 (1.739343) | 4.852043 / 5.269862 (-0.417819) | 3.177392 / 4.565676 (-1.388285) | 0.099796 / 0.424275 (-0.324479) | 0.009868 / 0.007607 (0.002261) | 0.819919 / 0.226044 (0.593874) | 7.911255 / 2.268929 (5.642326) | 3.839877 / 55.444624 (-51.604747) | 3.088663 / 6.876477 (-3.787813) | 3.371184 / 2.142072 (1.229112) | 1.072762 / 4.805227 (-3.732466) | 0.224536 / 6.500664 (-6.276128) | 0.083415 / 0.075469 (0.007946) |

### Benchmark: benchmark_map_filter.json

| metric | filter | map fast-tokenizer batched | map identity | map identity batched | map no-op batched | map no-op batched numpy | map no-op batched pandas | map no-op batched pytorch | map no-op batched tensorflow |
|--------|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 1.754426 / 1.841788 (-0.087361) | 25.546690 / 8.074308 (17.472382) | 22.998252 / 10.191392 (12.806860) | 0.258019 / 0.680424 (-0.422405) | 0.030104 / 0.534201 (-0.504097) | 0.518406 / 0.579283 (-0.060877) | 0.605753 / 0.434364 (0.171389) | 0.599630 / 0.540337 (0.059292) | 0.819042 / 1.386936 (-0.567894) |

</details>
</details>

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