Issue: Release: 2.11.0
State: closed
Author: lhoestq


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) | 0.007017 / 0.011353 (-0.004335) | 0.004917 / 0.011008 (-0.006091) | 0.098391 / 0.038508 (0.059883) | 0.032677 / 0.023109 (0.009568) | 0.312126 / 0.275898 (0.036227) | 0.352477 / 0.323480 (0.028998) | 0.005960 / 0.007986 (-0.002025) | 0.003801 / 0.004328 (-0.000528) | 0.073916 / 0.004250 (0.069666) | 0.045610 / 0.037052 (0.008557) | 0.319626 / 0.258489 (0.061137) | 0.370575 / 0.293841 (0.076734) | 0.035888 / 0.128546 (-0.092658) | 0.012012 / 0.075646 (-0.063635) | 0.338290 / 0.419271 (-0.080982) | 0.049452 / 0.043533 (0.005919) | 0.301226 / 0.255139 (0.046087) | 0.336744 / 0.283200 (0.053545) | 0.100835 / 0.141683 (-0.040847) | 1.500008 / 1.452155 (0.047853) | 1.566757 / 1.492716 (0.074041) |

### 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) | 0.220668 / 0.018006 (0.202662) | 0.449273 / 0.000490 (0.448784) | 0.003861 / 0.000200 (0.003661) | 0.000126 / 0.000054 (0.000072) |

### Benchmark: benchmark_indices_mapping.json

| metric | select | shard | shuffle | sort | train_test_split |
|--------|---|---|---|---|---|
| new / old (diff) | 0.026847 / 0.037411 (-0.010565) | 0.105916 / 0.014526 (0.091390) | 0.116245 / 0.176557 (-0.060312) | 0.172617 / 0.737135 (-0.564519) | 0.122846 / 0.296338 (-0.173492) |

### 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) | 0.417906 / 0.215209 (0.202697) | 4.169092 / 2.077655 (2.091437) | 1.934439 / 1.504120 (0.430319) | 1.735718 / 1.541195 (0.194523) | 1.828205 / 1.468490 (0.359715) | 0.697446 / 4.584777 (-3.887331) | 3.802830 / 3.745712 (0.057118) | 3.686464 / 5.269862 (-1.583398) | 1.863924 / 4.565676 (-2.701752) | 0.086520 / 0.424275 (-0.337755) | 0.012101 / 0.007607 (0.004493) | 0.521252 / 0.226044 (0.295208) | 5.200937 / 2.268929 (2.932009) | 2.414290 / 55.444624 (-53.030334) | 2.070890 / 6.876477 (-4.805587) | 2.237693 / 2.142072 (0.095621) | 0.843417 / 4.805227 (-3.961811) | 0.167856 / 6.500664 (-6.332809) | 0.064997 / 0.075469 (-0.010472) |

### 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) | 1.212334 / 1.841788 (-0.629454) | 14.710632 / 8.074308 (6.636324) | 14.877489 / 10.191392 (4.686097) | 0.151268 / 0.680424 (-0.529156) | 0.018663 / 0.534201 (-0.515538) | 0.429678 / 0.579283 (-0.149605) | 0.425054 / 0.434364 (-0.009310) | 0.502804 / 0.540337 (-0.037533) | 0.587932 / 1.386936 (-0.799004) |

</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) | 0.007462 / 0.011353 (-0.003891) | 0.005307 / 0.011008 (-0.005701) | 0.074309 / 0.038508 (0.035801) | 0.033437 / 0.023109 (0.010328) | 0.355087 / 0.275898 (0.079189) | 0.391417 / 0.323480 (0.067937) | 0.005904 / 0.007986 (-0.002082) | 0.004062 / 0.004328 (-0.000266) | 0.073801 / 0.004250 (0.069550) | 0.048503 / 0.037052 (0.011451) | 0.359547 / 0.258489 (0.101058) | 0.405325 / 0.293841 (0.111484) | 0.036615 / 0.128546 (-0.091931) | 0.012185 / 0.075646 (-0.063461) | 0.086829 / 0.419271 (-0.332443) | 0.049101 / 0.043533 (0.005569) | 0.334259 / 0.255139 (0.079120) | 0.376317 / 0.283200 (0.093117) | 0.099935 / 0.141683 (-0.041748) | 1.483166 / 1.452155 (0.031011) | 1.569092 / 1.492716 (0.076375) |

### 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) | 0.207528 / 0.018006 (0.189521) | 0.437473 / 0.000490 (0.436983) | 0.004915 / 0.000200 (0.004715) | 0.000097 / 0.000054 (0.000043) |

### Benchmark: benchmark_indices_mapping.json

| metric | select | shard | shuffle | sort | train_test_split |
|--------|---|---|---|---|---|
| new / old (diff) | 0.028632 / 0.037411 (-0.008780) | 0.111782 / 0.014526 (0.097256) | 0.122545 / 0.176557 (-0.054011) | 0.171191 / 0.737135 (-0.565945) | 0.128999 / 0.296338 (-0.167339) |

### 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) | 0.424422 / 0.215209 (0.209213) | 4.239488 / 2.077655 (2.161833) | 2.027969 / 1.504120 (0.523849) | 1.800667 / 1.541195 (0.259473) | 1.898701 / 1.468490 (0.430211) | 0.711453 / 4.584777 (-3.873324) | 3.766696 / 3.745712 (0.020984) | 2.107530 / 5.269862 (-3.162331) | 1.347137 / 4.565676 (-3.218540) | 0.086823 / 0.424275 (-0.337452) | 0.012137 / 0.007607 (0.004530) | 0.523143 / 0.226044 (0.297099) | 5.273434 / 2.268929 (3.004505) | 2.545463 / 55.444624 (-52.899161) | 2.246683 / 6.876477 (-4.629793) | 2.296862 / 2.142072 (0.154789) | 0.855690 / 4.805227 (-3.949538) | 0.168526 / 6.500664 (-6.332138) | 0.063392 / 0.075469 (-0.012078) |

### 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) | 1.248926 / 1.841788 (-0.592862) | 14.676308 / 8.074308 (6.602000) | 14.524364 / 10.191392 (4.332972) | 0.184138 / 0.680424 (-0.496286) | 0.017259 / 0.534201 (-0.516942) | 0.433875 / 0.579283 (-0.145408) | 0.416787 / 0.434364 (-0.017577) | 0.532391 / 0.540337 (-0.007947) | 0.628572 / 1.386936 (-0.758364) |

</details>
</details>

![](https://cml.dev/watermark.png#3929cc227a474ce0c716146c8d14ae94f8a7625b "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) | 0.006469 / 0.011353 (-0.004884) | 0.004499 / 0.011008 (-0.006510) | 0.098856 / 0.038508 (0.060348) | 0.027753 / 0.023109 (0.004644) | 0.321348 / 0.275898 (0.045450) | 0.351480 / 0.323480 (0.028000) | 0.004949 / 0.007986 (-0.003036) | 0.004655 / 0.004328 (0.000327) | 0.076732 / 0.004250 (0.072482) | 0.036175 / 0.037052 (-0.000878) | 0.310111 / 0.258489 (0.051622) | 0.372427 / 0.293841 (0.078586) | 0.031947 / 0.128546 (-0.096599) | 0.011669 / 0.075646 (-0.063977) | 0.323086 / 0.419271 (-0.096186) | 0.043578 / 0.043533 (0.000045) | 0.325549 / 0.255139 (0.070410) | 0.363827 / 0.283200 (0.080627) | 0.087819 / 0.141683 (-0.053864) | 1.479429 / 1.452155 (0.027274) | 1.549797 / 1.492716 (0.057080) |

### 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) | 0.178502 / 0.018006 (0.160496) | 0.415954 / 0.000490 (0.415465) | 0.008767 / 0.000200 (0.008567) | 0.000429 / 0.000054 (0.000375) |

### Benchmark: benchmark_indices_mapping.json

| metric | select | shard | shuffle | sort | train_test_split |
|--------|---|---|---|---|---|
| new / old (diff) | 0.023639 / 0.037411 (-0.013772) | 0.096266 / 0.014526 (0.081740) | 0.106406 / 0.176557 (-0.070151) | 0.168819 / 0.737135 (-0.568317) | 0.109158 / 0.296338 (-0.187181) |

### 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) | 0.420729 / 0.215209 (0.205520) | 4.219469 / 2.077655 (2.141814) | 1.885673 / 1.504120 (0.381553) | 1.681868 / 1.541195 (0.140674) | 1.709240 / 1.468490 (0.240749) | 0.694763 / 4.584777 (-3.890014) | 3.395377 / 3.745712 (-0.350335) | 1.846811 / 5.269862 (-3.423051) | 1.158381 / 4.565676 (-3.407296) | 0.082717 / 0.424275 (-0.341558) | 0.012302 / 0.007607 (0.004695) | 0.518148 / 0.226044 (0.292103) | 5.189590 / 2.268929 (2.920661) | 2.294127 / 55.444624 (-53.150498) | 1.960080 / 6.876477 (-4.916397) | 2.045359 / 2.142072 (-0.096713) | 0.803739 / 4.805227 (-4.001488) | 0.152322 / 6.500664 (-6.348342) | 0.067051 / 0.075469 (-0.008418) |

### 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) | 1.206582 / 1.841788 (-0.635206) | 13.590515 / 8.074308 (5.516207) | 14.083739 / 10.191392 (3.892347) | 0.128738 / 0.680424 (-0.551686) | 0.016577 / 0.534201 (-0.517624) | 0.375499 / 0.579283 (-0.203784) | 0.383256 / 0.434364 (-0.051108) | 0.439441 / 0.540337 (-0.100896) | 0.518102 / 1.386936 (-0.868834) |

</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) | 0.006708 / 0.011353 (-0.004645) | 0.004591 / 0.011008 (-0.006417) | 0.076512 / 0.038508 (0.038004) | 0.027977 / 0.023109 (0.004868) | 0.341915 / 0.275898 (0.066017) | 0.374381 / 0.323480 (0.050901) | 0.004985 / 0.007986 (-0.003001) | 0.003374 / 0.004328 (-0.000954) | 0.075334 / 0.004250 (0.071083) | 0.037522 / 0.037052 (0.000470) | 0.341702 / 0.258489 (0.083213) | 0.384342 / 0.293841 (0.090501) | 0.032231 / 0.128546 (-0.096315) | 0.011494 / 0.075646 (-0.064153) | 0.084897 / 0.419271 (-0.334375) | 0.041914 / 0.043533 (-0.001619) | 0.342030 / 0.255139 (0.086891) | 0.371024 / 0.283200 (0.087825) | 0.089936 / 0.141683 (-0.051746) | 1.497242 / 1.452155 (0.045087) | 1.585203 / 1.492716 (0.092486) |

### 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) | 0.227681 / 0.018006 (0.209674) | 0.398995 / 0.000490 (0.398505) | 0.003232 / 0.000200 (0.003032) | 0.000073 / 0.000054 (0.000019) |

### Benchmark: benchmark_indices_mapping.json

| metric | select | shard | shuffle | sort | train_test_split |
|--------|---|---|---|---|---|
| new / old (diff) | 0.024705 / 0.037411 (-0.012706) | 0.099906 / 0.014526 (0.085380) | 0.106806 / 0.176557 (-0.069750) | 0.157521 / 0.737135 (-0.579614) | 0.110803 / 0.296338 (-0.185535) |

### 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) | 0.457442 / 0.215209 (0.242233) | 4.580101 / 2.077655 (2.502446) | 2.094687 / 1.504120 (0.590567) | 1.880722 / 1.541195 (0.339528) | 1.938746 / 1.468490 (0.470256) | 0.700933 / 4.584777 (-3.883844) | 3.416278 / 3.745712 (-0.329434) | 2.852183 / 5.269862 (-2.417679) | 1.602659 / 4.565676 (-2.963017) | 0.083949 / 0.424275 (-0.340326) | 0.012255 / 0.007607 (0.004648) | 0.551631 / 0.226044 (0.325586) | 5.539225 / 2.268929 (3.270296) | 2.707298 / 55.444624 (-52.737326) | 2.354720 / 6.876477 (-4.521757) | 2.320790 / 2.142072 (0.178717) | 0.807152 / 4.805227 (-3.998075) | 0.152048 / 6.500664 (-6.348616) | 0.067723 / 0.075469 (-0.007746) |

### 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) | 1.295690 / 1.841788 (-0.546097) | 13.738082 / 8.074308 (5.663774) | 14.129549 / 10.191392 (3.938157) | 0.161568 / 0.680424 (-0.518855) | 0.016678 / 0.534201 (-0.517522) | 0.386609 / 0.579283 (-0.192674) | 0.383538 / 0.434364 (-0.050826) | 0.477872 / 0.540337 (-0.062465) | 0.564547 / 1.386936 (-0.822389) |

</details>
</details>

![](https://cml.dev/watermark.png#2ab4c98618bce7c1f60ce96d4a853a940ae4b250 "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) | 0.007247 / 0.011353 (-0.004106) | 0.005044 / 0.011008 (-0.005964) | 0.095135 / 0.038508 (0.056627) | 0.033622 / 0.023109 (0.010513) | 0.309969 / 0.275898 (0.034071) | 0.340354 / 0.323480 (0.016875) | 0.005635 / 0.007986 (-0.002351) | 0.003938 / 0.004328 (-0.000391) | 0.072089 / 0.004250 (0.067838) | 0.045592 / 0.037052 (0.008539) | 0.316620 / 0.258489 (0.058131) | 0.358174 / 0.293841 (0.064333) | 0.036446 / 0.128546 (-0.092100) | 0.011961 / 0.075646 (-0.063685) | 0.332299 / 0.419271 (-0.086973) | 0.049955 / 0.043533 (0.006422) | 0.307638 / 0.255139 (0.052499) | 0.331719 / 0.283200 (0.048519) | 0.095115 / 0.141683 (-0.046568) | 1.457960 / 1.452155 (0.005806) | 1.502812 / 1.492716 (0.010096) |

### 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) | 0.223747 / 0.018006 (0.205740) | 0.444837 / 0.000490 (0.444347) | 0.002583 / 0.000200 (0.002383) | 0.000084 / 0.000054 (0.000030) |

### Benchmark: benchmark_indices_mapping.json

| metric | select | shard | shuffle | sort | train_test_split |
|--------|---|---|---|---|---|
| new / old (diff) | 0.026461 / 0.037411 (-0.010951) | 0.103946 / 0.014526 (0.089420) | 0.114355 / 0.176557 (-0.062201) | 0.170076 / 0.737135 (-0.567059) | 0.121087 / 0.296338 (-0.175252) |

### 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) | 0.403252 / 0.215209 (0.188043) | 4.016911 / 2.077655 (1.939257) | 1.787168 / 1.504120 (0.283048) | 1.605206 / 1.541195 (0.064012) | 1.657012 / 1.468490 (0.188522) | 0.701425 / 4.584777 (-3.883352) | 3.818308 / 3.745712 (0.072596) | 3.493757 / 5.269862 (-1.776105) | 1.860534 / 4.565676 (-2.705142) | 0.084994 / 0.424275 (-0.339281) | 0.011904 / 0.007607 (0.004297) | 0.534199 / 0.226044 (0.308155) | 4.992703 / 2.268929 (2.723774) | 2.286231 / 55.444624 (-53.158393) | 1.918163 / 6.876477 (-4.958314) | 2.029811 / 2.142072 (-0.112262) | 0.837532 / 4.805227 (-3.967695) | 0.168545 / 6.500664 (-6.332119) | 0.062866 / 0.075469 (-0.012604) |

### 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) | 1.172862 / 1.841788 (-0.668926) | 14.966793 / 8.074308 (6.892485) | 14.202079 / 10.191392 (4.010687) | 0.144688 / 0.680424 (-0.535736) | 0.017499 / 0.534201 (-0.516702) | 0.443081 / 0.579283 (-0.136202) | 0.427496 / 0.434364 (-0.006868) | 0.525182 / 0.540337 (-0.015155) | 0.611849 / 1.386936 (-0.775087) |

</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) | 0.007264 / 0.011353 (-0.004089) | 0.005106 / 0.011008 (-0.005902) | 0.074101 / 0.038508 (0.035593) | 0.033388 / 0.023109 (0.010279) | 0.337108 / 0.275898 (0.061210) | 0.369820 / 0.323480 (0.046340) | 0.005701 / 0.007986 (-0.002284) | 0.003976 / 0.004328 (-0.000353) | 0.073517 / 0.004250 (0.069267) | 0.048741 / 0.037052 (0.011688) | 0.339118 / 0.258489 (0.080629) | 0.398687 / 0.293841 (0.104846) | 0.036661 / 0.128546 (-0.091886) | 0.012082 / 0.075646 (-0.063564) | 0.086743 / 0.419271 (-0.332529) | 0.050150 / 0.043533 (0.006617) | 0.335572 / 0.255139 (0.080433) | 0.354306 / 0.283200 (0.071107) | 0.102074 / 0.141683 (-0.039609) | 1.442911 / 1.452155 (-0.009244) | 1.531564 / 1.492716 (0.038848) |

### 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) | 0.183163 / 0.018006 (0.165157) | 0.439273 / 0.000490 (0.438783) | 0.002765 / 0.000200 (0.002565) | 0.000225 / 0.000054 (0.000171) |

### Benchmark: benchmark_indices_mapping.json

| metric | select | shard | shuffle | sort | train_test_split |
|--------|---|---|---|---|---|
| new / old (diff) | 0.028185 / 0.037411 (-0.009227) | 0.107337 / 0.014526 (0.092811) | 0.119925 / 0.176557 (-0.056631) | 0.172120 / 0.737135 (-0.565015) | 0.124332 / 0.296338 (-0.172007) |

### 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) | 0.428750 / 0.215209 (0.213541) | 4.268933 / 2.077655 (2.191279) | 2.050135 / 1.504120 (0.546015) | 1.837567 / 1.541195 (0.296372) | 1.907040 / 1.468490 (0.438549) | 0.694162 / 4.584777 (-3.890615) | 3.831542 / 3.745712 (0.085830) | 3.476580 / 5.269862 (-1.793281) | 1.855097 / 4.565676 (-2.710580) | 0.085816 / 0.424275 (-0.338459) | 0.012195 / 0.007607 (0.004588) | 0.544920 / 0.226044 (0.318876) | 5.332977 / 2.268929 (3.064049) | 2.592097 / 55.444624 (-52.852527) | 2.295411 / 6.876477 (-4.581065) | 2.330803 / 2.142072 (0.188730) | 0.833268 / 4.805227 (-3.971959) | 0.177698 / 6.500664 (-6.322966) | 0.063780 / 0.075469 (-0.011689) |

### 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) | 1.273361 / 1.841788 (-0.568427) | 14.981380 / 8.074308 (6.907072) | 14.395166 / 10.191392 (4.203774) | 0.186590 / 0.680424 (-0.493834) | 0.017676 / 0.534201 (-0.516525) | 0.432100 / 0.579283 (-0.147183) | 0.422490 / 0.434364 (-0.011874) | 0.531421 / 0.540337 (-0.008916) | 0.628548 / 1.386936 (-0.758388) |

</details>
</details>

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<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) | 0.009005 / 0.011353 (-0.002348) | 0.005803 / 0.011008 (-0.005205) | 0.103491 / 0.038508 (0.064983) | 0.048099 / 0.023109 (0.024990) | 0.304026 / 0.275898 (0.028128) | 0.340840 / 0.323480 (0.017360) | 0.006782 / 0.007986 (-0.001204) | 0.004625 / 0.004328 (0.000296) | 0.076695 / 0.004250 (0.072445) | 0.057541 / 0.037052 (0.020489) | 0.304015 / 0.258489 (0.045526) | 0.347822 / 0.293841 (0.053981) | 0.037904 / 0.128546 (-0.090642) | 0.012686 / 0.075646 (-0.062960) | 0.368093 / 0.419271 (-0.051179) | 0.051795 / 0.043533 (0.008262) | 0.302553 / 0.255139 (0.047415) | 0.328581 / 0.283200 (0.045381) | 0.108947 / 0.141683 (-0.032736) | 1.449770 / 1.452155 (-0.002385) | 1.541944 / 1.492716 (0.049227) |

### 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) | 0.207529 / 0.018006 (0.189523) | 0.455313 / 0.000490 (0.454823) | 0.008276 / 0.000200 (0.008076) | 0.000322 / 0.000054 (0.000268) |

### Benchmark: benchmark_indices_mapping.json

| metric | select | shard | shuffle | sort | train_test_split |
|--------|---|---|---|---|---|
| new / old (diff) | 0.030564 / 0.037411 (-0.006848) | 0.122790 / 0.014526 (0.108264) | 0.126981 / 0.176557 (-0.049576) | 0.187203 / 0.737135 (-0.549932) | 0.129931 / 0.296338 (-0.166408) |

### 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) | 0.402680 / 0.215209 (0.187471) | 4.017505 / 2.077655 (1.939850) | 1.801480 / 1.504120 (0.297360) | 1.647984 / 1.541195 (0.106790) | 1.702596 / 1.468490 (0.234106) | 0.717469 / 4.584777 (-3.867308) | 3.793813 / 3.745712 (0.048101) | 2.288014 / 5.269862 (-2.981848) | 1.497545 / 4.565676 (-3.068132) | 0.091241 / 0.424275 (-0.333034) | 0.013115 / 0.007607 (0.005508) | 0.498567 / 0.226044 (0.272522) | 4.990203 / 2.268929 (2.721275) | 2.334983 / 55.444624 (-53.109642) | 2.047888 / 6.876477 (-4.828589) | 2.167825 / 2.142072 (0.025753) | 0.863769 / 4.805227 (-3.941459) | 0.172699 / 6.500664 (-6.327965) | 0.069285 / 0.075469 (-0.006184) |

### 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) | 1.397331 / 1.841788 (-0.444457) | 16.678240 / 8.074308 (8.603932) | 16.665143 / 10.191392 (6.473751) | 0.151011 / 0.680424 (-0.529412) | 0.018303 / 0.534201 (-0.515898) | 0.445389 / 0.579283 (-0.133894) | 0.444644 / 0.434364 (0.010280) | 0.524647 / 0.540337 (-0.015690) | 0.629747 / 1.386936 (-0.757189) |

</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) | 0.008853 / 0.011353 (-0.002499) | 0.006196 / 0.011008 (-0.004813) | 0.078595 / 0.038508 (0.040087) | 0.048348 / 0.023109 (0.025239) | 0.347038 / 0.275898 (0.071140) | 0.385807 / 0.323480 (0.062327) | 0.007047 / 0.007986 (-0.000938) | 0.004772 / 0.004328 (0.000443) | 0.076116 / 0.004250 (0.071866) | 0.058805 / 0.037052 (0.021752) | 0.345731 / 0.258489 (0.087242) | 0.401589 / 0.293841 (0.107748) | 0.039349 / 0.128546 (-0.089197) | 0.012949 / 0.075646 (-0.062697) | 0.089761 / 0.419271 (-0.329511) | 0.060001 / 0.043533 (0.016468) | 0.351587 / 0.255139 (0.096448) | 0.377708 / 0.283200 (0.094509) | 0.117391 / 0.141683 (-0.024292) | 1.471622 / 1.452155 (0.019467) | 1.568759 / 1.492716 (0.076042) |

### 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) | 0.191390 / 0.018006 (0.173384) | 0.469033 / 0.000490 (0.468544) | 0.003615 / 0.000200 (0.003415) | 0.000113 / 0.000054 (0.000059) |

### Benchmark: benchmark_indices_mapping.json

| metric | select | shard | shuffle | sort | train_test_split |
|--------|---|---|---|---|---|
| new / old (diff) | 0.032706 / 0.037411 (-0.004706) | 0.127095 / 0.014526 (0.112569) | 0.128755 / 0.176557 (-0.047801) | 0.182590 / 0.737135 (-0.554545) | 0.136939 / 0.296338 (-0.159400) |

### 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) | 0.427392 / 0.215209 (0.212183) | 4.246708 / 2.077655 (2.169053) | 2.115557 / 1.504120 (0.611437) | 2.021221 / 1.541195 (0.480026) | 2.177559 / 1.468490 (0.709069) | 0.713930 / 4.584777 (-3.870847) | 4.192467 / 3.745712 (0.446755) | 3.645437 / 5.269862 (-1.624424) | 1.964986 / 4.565676 (-2.600690) | 0.089436 / 0.424275 (-0.334839) | 0.012917 / 0.007607 (0.005310) | 0.530468 / 0.226044 (0.304423) | 5.310759 / 2.268929 (3.041831) | 2.613566 / 55.444624 (-52.831058) | 2.350443 / 6.876477 (-4.526034) | 2.385278 / 2.142072 (0.243205) | 0.862838 / 4.805227 (-3.942389) | 0.172246 / 6.500664 (-6.328418) | 0.069570 / 0.075469 (-0.005899) |

### 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) | 1.310008 / 1.841788 (-0.531780) | 16.557079 / 8.074308 (8.482771) | 15.818145 / 10.191392 (5.626752) | 0.180337 / 0.680424 (-0.500087) | 0.018117 / 0.534201 (-0.516083) | 0.433189 / 0.579283 (-0.146095) | 0.429276 / 0.434364 (-0.005088) | 0.539757 / 0.540337 (-0.000580) | 0.640905 / 1.386936 (-0.746031) |

</details>
</details>

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