Iterable torch formatting
Opened by lhoestq (closed)

Used the TorchFormatter to get torch tensors in iterable dataset with format set to "torch".

It uses the data from Arrow if possible, otherwise applies recursive_tensorize.

When set back to format_type=None, cast_to_python_objects is used.

requires https://github.com/huggingface/datasets/pull/5821

close https://github.com/huggingface/datasets/issues/5793

Comments:
<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) | 0.006567 / 0.011353 (-0.004786) | 0.004479 / 0.011008 (-0.006530) | 0.028286 / 0.038508 (-0.010222) | 0.033137 / 0.023109 (0.010028) | 0.305249 / 0.275898 (0.029351) | 0.330306 / 0.323480 (0.006826) | 0.003747 / 0.007986 (-0.004238) | 0.004409 / 0.004328 (0.000081) | 0.004742 / 0.004250 (0.000491) | 0.040780 / 0.037052 (0.003728) | 0.302879 / 0.258489 (0.044390) | 0.346880 / 0.293841 (0.053039) | 0.032908 / 0.128546 (-0.095638) | 0.010617 / 0.075646 (-0.065029) | 0.257996 / 0.419271 (-0.161275) | 0.051044 / 0.043533 (0.007511) | 0.306113 / 0.255139 (0.050974) | 0.324444 / 0.283200 (0.041244) | 0.100820 / 0.141683 (-0.040863) | 1.478402 / 1.452155 (0.026248) | 1.599398 / 1.492716 (0.106682) |

### 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) | 0.216540 / 0.018006 (0.198534) | 0.433480 / 0.000490 (0.432991) | 0.004032 / 0.000200 (0.003832) | 0.000084 / 0.000054 (0.000029) |

### Benchmark: benchmark_indices_mapping.json

| metric | select | shard | shuffle | sort | train_test_split |
|--------|---|---|---|---|---|
| new / old (diff) | 0.027807 / 0.037411 (-0.009604) | 0.107225 / 0.014526 (0.092699) | 0.120157 / 0.176557 (-0.056400) | 0.174130 / 0.737135 (-0.563005) | 0.128902 / 0.296338 (-0.167437) |

### 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) | 0.395996 / 0.215209 (0.180787) | 3.936254 / 2.077655 (1.858599) | 1.808864 / 1.504120 (0.304744) | 1.608935 / 1.541195 (0.067741) | 1.646427 / 1.468490 (0.177937) | 0.716026 / 4.584777 (-3.868751) | 3.815045 / 3.745712 (0.069333) | 2.271534 / 5.269862 (-2.998327) | 1.548728 / 4.565676 (-3.016948) | 0.076743 / 0.424275 (-0.347532) | 0.011575 / 0.007607 (0.003968) | 0.499202 / 0.226044 (0.273158) | 4.983754 / 2.268929 (2.714825) | 2.239319 / 55.444624 (-53.205306) | 1.919427 / 6.876477 (-4.957050) | 2.019664 / 2.142072 (-0.122408) | 0.866318 / 4.805227 (-3.938910) | 0.157309 / 6.500664 (-6.343355) | 0.063341 / 0.075469 (-0.012128) |

### 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) | 1.180817 / 1.841788 (-0.660971) | 14.579869 / 8.074308 (6.505561) | 14.277848 / 10.191392 (4.086456) | 0.182560 / 0.680424 (-0.497863) | 0.017402 / 0.534201 (-0.516799) | 0.411549 / 0.579283 (-0.167734) | 0.432938 / 0.434364 (-0.001426) | 0.545067 / 0.540337 (0.004730) | 0.642173 / 1.386936 (-0.744763) |

</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) | 0.006753 / 0.011353 (-0.004600) | 0.004590 / 0.011008 (-0.006418) | 0.006111 / 0.038508 (-0.032397) | 0.032763 / 0.023109 (0.009654) | 0.401001 / 0.275898 (0.125103) | 0.428063 / 0.323480 (0.104583) | 0.003730 / 0.007986 (-0.004255) | 0.004617 / 0.004328 (0.000289) | 0.004770 / 0.004250 (0.000519) | 0.049718 / 0.037052 (0.012666) | 0.399724 / 0.258489 (0.141235) | 0.440292 / 0.293841 (0.146451) | 0.032846 / 0.128546 (-0.095700) | 0.010842 / 0.075646 (-0.064804) | 0.012642 / 0.419271 (-0.406630) | 0.046043 / 0.043533 (0.002510) | 0.390862 / 0.255139 (0.135723) | 0.407027 / 0.283200 (0.123828) | 0.099349 / 0.141683 (-0.042334) | 1.455739 / 1.452155 (0.003584) | 1.572214 / 1.492716 (0.079497) |

### 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) | 0.227186 / 0.018006 (0.209180) | 0.447404 / 0.000490 (0.446914) | 0.000400 / 0.000200 (0.000200) | 0.000055 / 0.000054 (0.000000) |

### Benchmark: benchmark_indices_mapping.json

| metric | select | shard | shuffle | sort | train_test_split |
|--------|---|---|---|---|---|
| new / old (diff) | 0.029830 / 0.037411 (-0.007581) | 0.112365 / 0.014526 (0.097839) | 0.125736 / 0.176557 (-0.050821) | 0.174781 / 0.737135 (-0.562354) | 0.129439 / 0.296338 (-0.166900) |

### 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) | 0.444438 / 0.215209 (0.229229) | 4.459381 / 2.077655 (2.381726) | 2.264541 / 1.504120 (0.760421) | 2.075257 / 1.541195 (0.534062) | 2.181289 / 1.468490 (0.712799) | 0.725279 / 4.584777 (-3.859498) | 3.863253 / 3.745712 (0.117541) | 2.132498 / 5.269862 (-3.137364) | 1.402003 / 4.565676 (-3.163673) | 0.084268 / 0.424275 (-0.340007) | 0.011762 / 0.007607 (0.004155) | 0.556239 / 0.226044 (0.330194) | 5.617998 / 2.268929 (3.349070) | 2.754789 / 55.444624 (-52.689835) | 2.418418 / 6.876477 (-4.458059) | 2.479696 / 2.142072 (0.337624) | 0.870037 / 4.805227 (-3.935190) | 0.160480 / 6.500664 (-6.340184) | 0.064464 / 0.075469 (-0.011005) |

### 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) | 1.290916 / 1.841788 (-0.550872) | 14.783173 / 8.074308 (6.708865) | 13.355883 / 10.191392 (3.164491) | 0.169963 / 0.680424 (-0.510461) | 0.017657 / 0.534201 (-0.516544) | 0.409218 / 0.579283 (-0.170065) | 0.422942 / 0.434364 (-0.011422) | 0.494968 / 0.540337 (-0.045369) | 0.587044 / 1.386936 (-0.799892) |

</details>
</details>

![](https://cml.dev/watermark.png#2051e912d9525bc38a1caf295df0620619c488eb "CML watermark")


_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) | 0.007183 / 0.011353 (-0.004169) | 0.004586 / 0.011008 (-0.006423) | 0.032668 / 0.038508 (-0.005840) | 0.040896 / 0.023109 (0.017787) | 0.358225 / 0.275898 (0.082327) | 0.395063 / 0.323480 (0.071583) | 0.004540 / 0.007986 (-0.003446) | 0.003849 / 0.004328 (-0.000480) | 0.005521 / 0.004250 (0.001271) | 0.053314 / 0.037052 (0.016262) | 0.362417 / 0.258489 (0.103928) | 0.414337 / 0.293841 (0.120496) | 0.030698 / 0.128546 (-0.097849) | 0.008823 / 0.075646 (-0.066823) | 0.303583 / 0.419271 (-0.115689) | 0.060277 / 0.043533 (0.016744) | 0.365938 / 0.255139 (0.110799) | 0.379554 / 0.283200 (0.096354) | 0.122545 / 0.141683 (-0.019138) | 1.712098 / 1.452155 (0.259943) | 1.802036 / 1.492716 (0.309319) |

### 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) | 0.239508 / 0.018006 (0.221502) | 0.492194 / 0.000490 (0.491704) | 0.003280 / 0.000200 (0.003081) | 0.000096 / 0.000054 (0.000042) |

### Benchmark: benchmark_indices_mapping.json

| metric | select | shard | shuffle | sort | train_test_split |
|--------|---|---|---|---|---|
| new / old (diff) | 0.033301 / 0.037411 (-0.004110) | 0.125851 / 0.014526 (0.111325) | 0.137757 / 0.176557 (-0.038799) | 0.207603 / 0.737135 (-0.529533) | 0.143507 / 0.296338 (-0.152831) |

### 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) | 0.470662 / 0.215209 (0.255453) | 4.736017 / 2.077655 (2.658363) | 2.154152 / 1.504120 (0.650032) | 1.954243 / 1.541195 (0.413048) | 2.080186 / 1.468490 (0.611696) | 0.622884 / 4.584777 (-3.961893) | 4.385885 / 3.745712 (0.640173) | 2.262085 / 5.269862 (-3.007776) | 1.454215 / 4.565676 (-3.111462) | 0.067342 / 0.424275 (-0.356933) | 0.012913 / 0.007607 (0.005306) | 0.600676 / 0.226044 (0.374631) | 5.915093 / 2.268929 (3.646164) | 2.664915 / 55.444624 (-52.779709) | 2.286986 / 6.876477 (-4.589490) | 2.387776 / 2.142072 (0.245704) | 0.757067 / 4.805227 (-4.048160) | 0.154625 / 6.500664 (-6.346039) | 0.074632 / 0.075469 (-0.000838) |

### 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) | 1.413229 / 1.841788 (-0.428558) | 17.433012 / 8.074308 (9.358704) | 16.980340 / 10.191392 (6.788948) | 0.218943 / 0.680424 (-0.461481) | 0.020525 / 0.534201 (-0.513676) | 0.451847 / 0.579283 (-0.127436) | 0.495587 / 0.434364 (0.061223) | 0.548739 / 0.540337 (0.008402) | 0.662120 / 1.386936 (-0.724816) |

</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) | 0.006775 / 0.011353 (-0.004577) | 0.004556 / 0.011008 (-0.006452) | 0.006462 / 0.038508 (-0.032046) | 0.039073 / 0.023109 (0.015964) | 0.429249 / 0.275898 (0.153351) | 0.469946 / 0.323480 (0.146467) | 0.004402 / 0.007986 (-0.003584) | 0.003798 / 0.004328 (-0.000530) | 0.005347 / 0.004250 (0.001097) | 0.053743 / 0.037052 (0.016691) | 0.434635 / 0.258489 (0.176146) | 0.475661 / 0.293841 (0.181820) | 0.029891 / 0.128546 (-0.098656) | 0.009058 / 0.075646 (-0.066588) | 0.010987 / 0.419271 (-0.408284) | 0.053877 / 0.043533 (0.010344) | 0.434428 / 0.255139 (0.179289) | 0.449637 / 0.283200 (0.166437) | 0.124331 / 0.141683 (-0.017352) | 1.736083 / 1.452155 (0.283928) | 1.831632 / 1.492716 (0.338916) |

### 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) | 0.248428 / 0.018006 (0.230422) | 0.493113 / 0.000490 (0.492623) | 0.000429 / 0.000200 (0.000229) | 0.000057 / 0.000054 (0.000002) |

### Benchmark: benchmark_indices_mapping.json

| metric | select | shard | shuffle | sort | train_test_split |
|--------|---|---|---|---|---|
| new / old (diff) | 0.031337 / 0.037411 (-0.006074) | 0.132360 / 0.014526 (0.117834) | 0.134734 / 0.176557 (-0.041822) | 0.193811 / 0.737135 (-0.543324) | 0.146883 / 0.296338 (-0.149456) |

### 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) | 0.510876 / 0.215209 (0.295666) | 5.170198 / 2.077655 (3.092543) | 2.572105 / 1.504120 (1.067985) | 2.316918 / 1.541195 (0.775723) | 2.449316 / 1.468490 (0.980826) | 0.612219 / 4.584777 (-3.972558) | 4.456740 / 3.745712 (0.711028) | 2.099757 / 5.269862 (-3.170105) | 1.293017 / 4.565676 (-3.272660) | 0.067922 / 0.424275 (-0.356353) | 0.013467 / 0.007607 (0.005860) | 0.634240 / 0.226044 (0.408196) | 6.373111 / 2.268929 (4.104182) | 3.171567 / 55.444624 (-52.273057) | 2.763411 / 6.876477 (-4.113066) | 2.845557 / 2.142072 (0.703485) | 0.763431 / 4.805227 (-4.041797) | 0.155949 / 6.500664 (-6.344715) | 0.076264 / 0.075469 (0.000795) |

### 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) | 1.468075 / 1.841788 (-0.373713) | 17.582354 / 8.074308 (9.508046) | 16.565964 / 10.191392 (6.374572) | 0.163779 / 0.680424 (-0.516644) | 0.020472 / 0.534201 (-0.513728) | 0.444416 / 0.579283 (-0.134867) | 0.488471 / 0.434364 (0.054107) | 0.550661 / 0.540337 (0.010323) | 0.667230 / 1.386936 (-0.719706) |

</details>
</details>

![](https://cml.dev/watermark.png#3655cbf1c627c945e393641d35298a166f1e4bf5 "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) | 0.006160 / 0.011353 (-0.005193) | 0.004093 / 0.011008 (-0.006915) | 0.056485 / 0.038508 (0.017977) | 0.033637 / 0.023109 (0.010528) | 0.296448 / 0.275898 (0.020550) | 0.332532 / 0.323480 (0.009052) | 0.003864 / 0.007986 (-0.004122) | 0.003446 / 0.004328 (-0.000883) | 0.034808 / 0.004250 (0.030558) | 0.048567 / 0.037052 (0.011514) | 0.296090 / 0.258489 (0.037601) | 0.336067 / 0.293841 (0.042226) | 0.026081 / 0.128546 (-0.102465) | 0.007875 / 0.075646 (-0.067771) | 0.286049 / 0.419271 (-0.133222) | 0.050411 / 0.043533 (0.006878) | 0.297016 / 0.255139 (0.041877) | 0.320030 / 0.283200 (0.036830) | 0.110374 / 0.141683 (-0.031308) | 1.432470 / 1.452155 (-0.019684) | 1.492479 / 1.492716 (-0.000238) |

### 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) | 0.262352 / 0.018006 (0.244346) | 0.557956 / 0.000490 (0.557467) | 0.010296 / 0.000200 (0.010096) | 0.000315 / 0.000054 (0.000260) |

### Benchmark: benchmark_indices_mapping.json

| metric | select | shard | shuffle | sort | train_test_split |
|--------|---|---|---|---|---|
| new / old (diff) | 0.028801 / 0.037411 (-0.008611) | 0.109844 / 0.014526 (0.095318) | 0.122333 / 0.176557 (-0.054224) | 0.180571 / 0.737135 (-0.556564) | 0.125990 / 0.296338 (-0.170348) |

### 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) | 0.401643 / 0.215209 (0.186434) | 4.020993 / 2.077655 (1.943338) | 1.815256 / 1.504120 (0.311136) | 1.619579 / 1.541195 (0.078384) | 1.708889 / 1.468490 (0.240398) | 0.537847 / 4.584777 (-4.046930) | 3.743331 / 3.745712 (-0.002381) | 1.779891 / 5.269862 (-3.489970) | 1.021423 / 4.565676 (-3.544253) | 0.058869 / 0.424275 (-0.365406) | 0.011826 / 0.007607 (0.004218) | 0.499665 / 0.226044 (0.273621) | 4.980928 / 2.268929 (2.712000) | 2.285664 / 55.444624 (-53.158960) | 1.936553 / 6.876477 (-4.939923) | 2.090428 / 2.142072 (-0.051645) | 0.655218 / 4.805227 (-4.150009) | 0.133178 / 6.500664 (-6.367486) | 0.062991 / 0.075469 (-0.012478) |

### 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) | 1.168895 / 1.841788 (-0.672892) | 14.656773 / 8.074308 (6.582465) | 13.737921 / 10.191392 (3.546529) | 0.145383 / 0.680424 (-0.535041) | 0.017614 / 0.534201 (-0.516587) | 0.386499 / 0.579283 (-0.192784) | 0.425626 / 0.434364 (-0.008738) | 0.389572 / 0.540337 (-0.150766) | 0.386753 / 1.386936 (-1.000183) |

</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) | 0.005998 / 0.011353 (-0.005355) | 0.004265 / 0.011008 (-0.006743) | 0.034743 / 0.038508 (-0.003766) | 0.033929 / 0.023109 (0.010820) | 0.405535 / 0.275898 (0.129636) | 0.407235 / 0.323480 (0.083755) | 0.003972 / 0.007986 (-0.004013) | 0.003616 / 0.004328 (-0.000712) | 0.035278 / 0.004250 (0.031027) | 0.052990 / 0.037052 (0.015937) | 0.405228 / 0.258489 (0.146739) | 0.415007 / 0.293841 (0.121166) | 0.025951 / 0.128546 (-0.102595) | 0.007990 / 0.075646 (-0.067656) | 0.040492 / 0.419271 (-0.378779) | 0.049123 / 0.043533 (0.005591) | 0.399282 / 0.255139 (0.144143) | 0.384303 / 0.283200 (0.101103) | 0.115234 / 0.141683 (-0.026448) | 1.476904 / 1.452155 (0.024749) | 1.627191 / 1.492716 (0.134475) |

### 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) | 0.209211 / 0.018006 (0.191205) | 0.566718 / 0.000490 (0.566228) | 0.002094 / 0.000200 (0.001894) | 0.000104 / 0.000054 (0.000049) |

### Benchmark: benchmark_indices_mapping.json

| metric | select | shard | shuffle | sort | train_test_split |
|--------|---|---|---|---|---|
| new / old (diff) | 0.030885 / 0.037411 (-0.006526) | 0.110777 / 0.014526 (0.096251) | 0.124382 / 0.176557 (-0.052174) | 0.175081 / 0.737135 (-0.562054) | 0.130263 / 0.296338 (-0.166075) |

### 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) | 0.448091 / 0.215209 (0.232882) | 4.484404 / 2.077655 (2.406749) | 2.278438 / 1.504120 (0.774318) | 2.087933 / 1.541195 (0.546738) | 2.186709 / 1.468490 (0.718219) | 0.534822 / 4.584777 (-4.049955) | 3.778229 / 3.745712 (0.032517) | 3.312334 / 5.269862 (-1.957528) | 1.557209 / 4.565676 (-3.008467) | 0.058923 / 0.424275 (-0.365352) | 0.011350 / 0.007607 (0.003743) | 0.550470 / 0.226044 (0.324426) | 5.480347 / 2.268929 (3.211419) | 2.781709 / 55.444624 (-52.662915) | 2.478729 / 6.876477 (-4.397748) | 2.492001 / 2.142072 (0.349929) | 0.652649 / 4.805227 (-4.152578) | 0.131334 / 6.500664 (-6.369330) | 0.065619 / 0.075469 (-0.009850) |

### 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) | 1.253998 / 1.841788 (-0.587790) | 15.207433 / 8.074308 (7.133124) | 14.627842 / 10.191392 (4.436450) | 0.146947 / 0.680424 (-0.533477) | 0.017533 / 0.534201 (-0.516668) | 0.391627 / 0.579283 (-0.187656) | 0.431113 / 0.434364 (-0.003251) | 0.413886 / 0.540337 (-0.126451) | 0.414483 / 1.386936 (-0.972453) |

</details>
</details>

![](https://cml.dev/watermark.png#3f4e98701590a4922050051eb0f4d63e6125723d "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) | 0.007741 / 0.011353 (-0.003612) | 0.004584 / 0.011008 (-0.006424) | 0.067869 / 0.038508 (0.029361) | 0.041612 / 0.023109 (0.018503) | 0.377878 / 0.275898 (0.101980) | 0.421633 / 0.323480 (0.098153) | 0.004614 / 0.007986 (-0.003371) | 0.003824 / 0.004328 (-0.000504) | 0.041479 / 0.004250 (0.037229) | 0.053309 / 0.037052 (0.016256) | 0.390147 / 0.258489 (0.131658) | 0.437706 / 0.293841 (0.143865) | 0.035951 / 0.128546 (-0.092595) | 0.009231 / 0.075646 (-0.066415) | 0.357572 / 0.419271 (-0.061699) | 0.081332 / 0.043533 (0.037799) | 0.370076 / 0.255139 (0.114937) | 0.423653 / 0.283200 (0.140453) | 0.141401 / 0.141683 (-0.000282) | 1.722744 / 1.452155 (0.270589) | 1.914668 / 1.492716 (0.421952) |

### 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) | 0.256568 / 0.018006 (0.238562) | 0.512243 / 0.000490 (0.511753) | 0.019913 / 0.000200 (0.019713) | 0.000136 / 0.000054 (0.000082) |

### Benchmark: benchmark_indices_mapping.json

| metric | select | shard | shuffle | sort | train_test_split |
|--------|---|---|---|---|---|
| new / old (diff) | 0.031742 / 0.037411 (-0.005670) | 0.128537 / 0.014526 (0.114011) | 0.139962 / 0.176557 (-0.036594) | 0.210711 / 0.737135 (-0.526424) | 0.147162 / 0.296338 (-0.149177) |

### 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) | 0.509518 / 0.215209 (0.294309) | 5.083788 / 2.077655 (3.006134) | 2.455381 / 1.504120 (0.951262) | 2.208078 / 1.541195 (0.666883) | 2.341807 / 1.468490 (0.873317) | 0.580014 / 4.584777 (-4.004763) | 4.599492 / 3.745712 (0.853780) | 2.403249 / 5.269862 (-2.866612) | 1.559177 / 4.565676 (-3.006500) | 0.072846 / 0.424275 (-0.351429) | 0.017327 / 0.007607 (0.009720) | 0.627747 / 0.226044 (0.401703) | 6.242586 / 2.268929 (3.973657) | 2.982875 / 55.444624 (-52.461750) | 2.588645 / 6.876477 (-4.287832) | 2.765915 / 2.142072 (0.623843) | 0.720455 / 4.805227 (-4.084772) | 0.157474 / 6.500664 (-6.343190) | 0.074295 / 0.075469 (-0.001174) |

### 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) | 1.540799 / 1.841788 (-0.300988) | 18.054632 / 8.074308 (9.980324) | 16.544036 / 10.191392 (6.352644) | 0.201423 / 0.680424 (-0.479001) | 0.020497 / 0.534201 (-0.513704) | 0.496275 / 0.579283 (-0.083008) | 0.547380 / 0.434364 (0.113017) | 0.614605 / 0.540337 (0.074267) | 0.749889 / 1.386936 (-0.637047) |

</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) | 0.006963 / 0.011353 (-0.004389) | 0.004543 / 0.011008 (-0.006465) | 0.039530 / 0.038508 (0.001022) | 0.038420 / 0.023109 (0.015311) | 0.454885 / 0.275898 (0.178987) | 0.491731 / 0.323480 (0.168251) | 0.004211 / 0.007986 (-0.003775) | 0.003673 / 0.004328 (-0.000655) | 0.038735 / 0.004250 (0.034484) | 0.052085 / 0.037052 (0.015032) | 0.448924 / 0.258489 (0.190435) | 0.499254 / 0.293841 (0.205413) | 0.030069 / 0.128546 (-0.098477) | 0.009082 / 0.075646 (-0.066565) | 0.047181 / 0.419271 (-0.372090) | 0.054758 / 0.043533 (0.011225) | 0.445035 / 0.255139 (0.189896) | 0.475090 / 0.283200 (0.191891) | 0.122641 / 0.141683 (-0.019042) | 1.706514 / 1.452155 (0.254360) | 1.855726 / 1.492716 (0.363010) |

### 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) | 0.246028 / 0.018006 (0.228022) | 0.486382 / 0.000490 (0.485892) | 0.003038 / 0.000200 (0.002838) | 0.000107 / 0.000054 (0.000053) |

### Benchmark: benchmark_indices_mapping.json

| metric | select | shard | shuffle | sort | train_test_split |
|--------|---|---|---|---|---|
| new / old (diff) | 0.034298 / 0.037411 (-0.003113) | 0.135364 / 0.014526 (0.120838) | 0.146102 / 0.176557 (-0.030455) | 0.207997 / 0.737135 (-0.529139) | 0.153119 / 0.296338 (-0.143219) |

### 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) | 0.528758 / 0.215209 (0.313549) | 5.243303 / 2.077655 (3.165648) | 2.617194 / 1.504120 (1.113074) | 2.400740 / 1.541195 (0.859545) | 2.534692 / 1.468490 (1.066202) | 0.585825 / 4.584777 (-3.998952) | 4.879766 / 3.745712 (1.134054) | 2.377419 / 5.269862 (-2.892443) | 1.460711 / 4.565676 (-3.104966) | 0.075572 / 0.424275 (-0.348703) | 0.013650 / 0.007607 (0.006042) | 0.697103 / 0.226044 (0.471058) | 6.444984 / 2.268929 (4.176055) | 3.227662 / 55.444624 (-52.216963) | 2.875163 / 6.876477 (-4.001314) | 2.860953 / 2.142072 (0.718881) | 0.718908 / 4.805227 (-4.086319) | 0.158005 / 6.500664 (-6.342659) | 0.077581 / 0.075469 (0.002112) |

### 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) | 1.653027 / 1.841788 (-0.188760) | 18.789342 / 8.074308 (10.715034) | 16.762678 / 10.191392 (6.571286) | 0.238920 / 0.680424 (-0.441504) | 0.020698 / 0.534201 (-0.513502) | 0.512634 / 0.579283 (-0.066649) | 0.542235 / 0.434364 (0.107871) | 0.626634 / 0.540337 (0.086297) | 0.753324 / 1.386936 (-0.633612) |

</details>
</details>

![](https://cml.dev/watermark.png#f978ad8bec6e5e77868c6ffcc6f514354a03901d "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) | 0.005737 / 0.011353 (-0.005616) | 0.003767 / 0.011008 (-0.007241) | 0.097792 / 0.038508 (0.059284) | 0.028466 / 0.023109 (0.005356) | 0.317703 / 0.275898 (0.041805) | 0.359512 / 0.323480 (0.036032) | 0.003428 / 0.007986 (-0.004558) | 0.002848 / 0.004328 (-0.001481) | 0.075668 / 0.004250 (0.071418) | 0.037165 / 0.037052 (0.000113) | 0.329539 / 0.258489 (0.071050) | 0.361365 / 0.293841 (0.067524) | 0.024777 / 0.128546 (-0.103769) | 0.008324 / 0.075646 (-0.067323) | 0.317346 / 0.419271 (-0.101926) | 0.043296 / 0.043533 (-0.000237) | 0.315318 / 0.255139 (0.060179) | 0.347641 / 0.283200 (0.064441) | 0.089551 / 0.141683 (-0.052132) | 1.506335 / 1.452155 (0.054180) | 1.573931 / 1.492716 (0.081215) |

### 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) | 0.208041 / 0.018006 (0.190034) | 0.428198 / 0.000490 (0.427708) | 0.002568 / 0.000200 (0.002369) | 0.000072 / 0.000054 (0.000018) |

### Benchmark: benchmark_indices_mapping.json

| metric | select | shard | shuffle | sort | train_test_split |
|--------|---|---|---|---|---|
| new / old (diff) | 0.023745 / 0.037411 (-0.013667) | 0.096256 / 0.014526 (0.081730) | 0.104917 / 0.176557 (-0.071639) | 0.164341 / 0.737135 (-0.572794) | 0.107972 / 0.296338 (-0.188367) |

### 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) | 0.453995 / 0.215209 (0.238786) | 4.546892 / 2.077655 (2.469238) | 2.185498 / 1.504120 (0.681378) | 1.989156 / 1.541195 (0.447962) | 2.053443 / 1.468490 (0.584953) | 0.559940 / 4.584777 (-4.024837) | 3.420759 / 3.745712 (-0.324954) | 1.771528 / 5.269862 (-3.498333) | 1.139692 / 4.565676 (-3.425984) | 0.067686 / 0.424275 (-0.356589) | 0.011729 / 0.007607 (0.004122) | 0.558001 / 0.226044 (0.331957) | 5.583886 / 2.268929 (3.314957) | 2.678726 / 55.444624 (-52.765899) | 2.324127 / 6.876477 (-4.552350) | 2.472805 / 2.142072 (0.330733) | 0.663163 / 4.805227 (-4.142065) | 0.134892 / 6.500664 (-6.365772) | 0.066722 / 0.075469 (-0.008747) |

### 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) | 1.195200 / 1.841788 (-0.646587) | 13.602517 / 8.074308 (5.528209) | 14.036344 / 10.191392 (3.844952) | 0.143759 / 0.680424 (-0.536665) | 0.017215 / 0.534201 (-0.516986) | 0.383749 / 0.579283 (-0.195534) | 0.388229 / 0.434364 (-0.046134) | 0.469366 / 0.540337 (-0.070971) | 0.560408 / 1.386936 (-0.826528) |

</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) | 0.005953 / 0.011353 (-0.005400) | 0.003840 / 0.011008 (-0.007168) | 0.077481 / 0.038508 (0.038973) | 0.028318 / 0.023109 (0.005209) | 0.403991 / 0.275898 (0.128093) | 0.433374 / 0.323480 (0.109894) | 0.003572 / 0.007986 (-0.004414) | 0.003033 / 0.004328 (-0.001295) | 0.075873 / 0.004250 (0.071623) | 0.039321 / 0.037052 (0.002269) | 0.416790 / 0.258489 (0.158301) | 0.459368 / 0.293841 (0.165527) | 0.025270 / 0.128546 (-0.103276) | 0.008574 / 0.075646 (-0.067072) | 0.083376 / 0.419271 (-0.335896) | 0.043206 / 0.043533 (-0.000327) | 0.404831 / 0.255139 (0.149692) | 0.418559 / 0.283200 (0.135360) | 0.099135 / 0.141683 (-0.042548) | 1.501315 / 1.452155 (0.049160) | 1.583912 / 1.492716 (0.091195) |

### 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) | 0.241510 / 0.018006 (0.223504) | 0.410473 / 0.000490 (0.409983) | 0.001857 / 0.000200 (0.001657) | 0.000081 / 0.000054 (0.000027) |

### Benchmark: benchmark_indices_mapping.json

| metric | select | shard | shuffle | sort | train_test_split |
|--------|---|---|---|---|---|
| new / old (diff) | 0.025366 / 0.037411 (-0.012045) | 0.103353 / 0.014526 (0.088828) | 0.107934 / 0.176557 (-0.068622) | 0.162388 / 0.737135 (-0.574747) | 0.113550 / 0.296338 (-0.182789) |

### 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) | 0.463529 / 0.215209 (0.248320) | 4.657688 / 2.077655 (2.580034) | 2.455088 / 1.504120 (0.950968) | 2.304833 / 1.541195 (0.763638) | 2.317520 / 1.468490 (0.849029) | 0.563395 / 4.584777 (-4.021382) | 3.408489 / 3.745712 (-0.337223) | 2.636379 / 5.269862 (-2.633482) | 1.425355 / 4.565676 (-3.140322) | 0.068335 / 0.424275 (-0.355940) | 0.011713 / 0.007607 (0.004106) | 0.550230 / 0.226044 (0.324186) | 5.519843 / 2.268929 (3.250915) | 2.864986 / 55.444624 (-52.579639) | 2.604821 / 6.876477 (-4.271655) | 2.701501 / 2.142072 (0.559428) | 0.668193 / 4.805227 (-4.137034) | 0.134739 / 6.500664 (-6.365925) | 0.067110 / 0.075469 (-0.008359) |

### 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) | 1.326358 / 1.841788 (-0.515430) | 14.184172 / 8.074308 (6.109864) | 14.139245 / 10.191392 (3.947853) | 0.151881 / 0.680424 (-0.528542) | 0.016718 / 0.534201 (-0.517483) | 0.367035 / 0.579283 (-0.212248) | 0.393512 / 0.434364 (-0.040852) | 0.441261 / 0.540337 (-0.099076) | 0.533907 / 1.386936 (-0.853029) |

</details>
</details>

![](https://cml.dev/watermark.png#54098759d023f0b3e8eccd2dd98d46a1c6d19cce "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) | 0.006275 / 0.011353 (-0.005078) | 0.003980 / 0.011008 (-0.007028) | 0.097617 / 0.038508 (0.059109) | 0.034089 / 0.023109 (0.010980) | 0.297381 / 0.275898 (0.021483) | 0.330106 / 0.323480 (0.006626) | 0.003838 / 0.007986 (-0.004148) | 0.004042 / 0.004328 (-0.000287) | 0.074305 / 0.004250 (0.070055) | 0.048318 / 0.037052 (0.011265) | 0.295585 / 0.258489 (0.037096) | 0.346924 / 0.293841 (0.053083) | 0.027397 / 0.128546 (-0.101150) | 0.008452 / 0.075646 (-0.067194) | 0.326837 / 0.419271 (-0.092435) | 0.049515 / 0.043533 (0.005982) | 0.303931 / 0.255139 (0.048792) | 0.317647 / 0.283200 (0.034447) | 0.098280 / 0.141683 (-0.043403) | 1.442603 / 1.452155 (-0.009552) | 1.524050 / 1.492716 (0.031334) |

### 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) | 0.215095 / 0.018006 (0.197089) | 0.437662 / 0.000490 (0.437173) | 0.009771 / 0.000200 (0.009571) | 0.000401 / 0.000054 (0.000346) |

### Benchmark: benchmark_indices_mapping.json

| metric | select | shard | shuffle | sort | train_test_split |
|--------|---|---|---|---|---|
| new / old (diff) | 0.027169 / 0.037411 (-0.010243) | 0.111383 / 0.014526 (0.096857) | 0.116163 / 0.176557 (-0.060394) | 0.173134 / 0.737135 (-0.564001) | 0.122376 / 0.296338 (-0.173962) |

### 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) | 0.398332 / 0.215209 (0.183123) | 3.974166 / 2.077655 (1.896511) | 1.793847 / 1.504120 (0.289727) | 1.615117 / 1.541195 (0.073922) | 1.660288 / 1.468490 (0.191798) | 0.523833 / 4.584777 (-4.060944) | 3.704273 / 3.745712 (-0.041439) | 1.873308 / 5.269862 (-3.396554) | 1.203546 / 4.565676 (-3.362131) | 0.064949 / 0.424275 (-0.359326) | 0.011830 / 0.007607 (0.004223) | 0.497294 / 0.226044 (0.271250) | 4.948663 / 2.268929 (2.679735) | 2.233391 / 55.444624 (-53.211234) | 1.903208 / 6.876477 (-4.973269) | 2.067908 / 2.142072 (-0.074164) | 0.644256 / 4.805227 (-4.160971) | 0.142798 / 6.500664 (-6.357866) | 0.064734 / 0.075469 (-0.010735) |

### 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) | 1.172313 / 1.841788 (-0.669475) | 14.665853 / 8.074308 (6.591545) | 13.147051 / 10.191392 (2.955659) | 0.139338 / 0.680424 (-0.541086) | 0.017452 / 0.534201 (-0.516749) | 0.395660 / 0.579283 (-0.183623) | 0.410138 / 0.434364 (-0.024226) | 0.460357 / 0.540337 (-0.079980) | 0.555670 / 1.386936 (-0.831266) |

</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) | 0.006247 / 0.011353 (-0.005106) | 0.004098 / 0.011008 (-0.006910) | 0.075050 / 0.038508 (0.036542) | 0.033232 / 0.023109 (0.010122) | 0.384139 / 0.275898 (0.108241) | 0.420865 / 0.323480 (0.097385) | 0.003889 / 0.007986 (-0.004096) | 0.003336 / 0.004328 (-0.000993) | 0.073837 / 0.004250 (0.069587) | 0.048775 / 0.037052 (0.011723) | 0.386373 / 0.258489 (0.127884) | 0.421718 / 0.293841 (0.127878) | 0.027553 / 0.128546 (-0.100993) | 0.008724 / 0.075646 (-0.066922) | 0.080970 / 0.419271 (-0.338302) | 0.045981 / 0.043533 (0.002448) | 0.364381 / 0.255139 (0.109242) | 0.391203 / 0.283200 (0.108004) | 0.101681 / 0.141683 (-0.040002) | 1.469533 / 1.452155 (0.017378) | 1.562016 / 1.492716 (0.069300) |

### 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) | 0.222318 / 0.018006 (0.204312) | 0.441395 / 0.000490 (0.440905) | 0.000408 / 0.000200 (0.000208) | 0.000057 / 0.000054 (0.000002) |

### Benchmark: benchmark_indices_mapping.json

| metric | select | shard | shuffle | sort | train_test_split |
|--------|---|---|---|---|---|
| new / old (diff) | 0.030291 / 0.037411 (-0.007120) | 0.114053 / 0.014526 (0.099527) | 0.123124 / 0.176557 (-0.053433) | 0.173474 / 0.737135 (-0.563661) | 0.129946 / 0.296338 (-0.166393) |

### 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) | 0.430342 / 0.215209 (0.215133) | 4.309782 / 2.077655 (2.232128) | 2.110668 / 1.504120 (0.606548) | 1.922881 / 1.541195 (0.381687) | 1.993562 / 1.468490 (0.525072) | 0.523682 / 4.584777 (-4.061095) | 3.774152 / 3.745712 (0.028440) | 3.354783 / 5.269862 (-1.915079) | 1.489793 / 4.565676 (-3.075884) | 0.065169 / 0.424275 (-0.359107) | 0.011626 / 0.007607 (0.004019) | 0.539126 / 0.226044 (0.313081) | 5.372593 / 2.268929 (3.103664) | 2.570652 / 55.444624 (-52.873973) | 2.253353 / 6.876477 (-4.623123) | 2.312876 / 2.142072 (0.170804) | 0.644241 / 4.805227 (-4.160986) | 0.138326 / 6.500664 (-6.362338) | 0.064491 / 0.075469 (-0.010979) |

### 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) | 1.344164 / 1.841788 (-0.497624) | 15.124679 / 8.074308 (7.050371) | 14.799310 / 10.191392 (4.607918) | 0.149054 / 0.680424 (-0.531370) | 0.017564 / 0.534201 (-0.516637) | 0.394593 / 0.579283 (-0.184690) | 0.428768 / 0.434364 (-0.005596) | 0.468235 / 0.540337 (-0.072103) | 0.557384 / 1.386936 (-0.829552) |

</details>
</details>

![](https://cml.dev/watermark.png#a8bfac259e2b5047bb8a0cdcefc8357477ebf93c "CML watermark")


@albertvillanova could you take a look at this one ? It directly follows the arrow formatting PR

I added tests for the `__array__` case which lets you go from any tensor format to any other tensor format.

I also properly deprecated format_type and added a warning message.

<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) | 0.007838 / 0.011353 (-0.003515) | 0.005177 / 0.011008 (-0.005831) | 0.131058 / 0.038508 (0.092550) | 0.035959 / 0.023109 (0.012850) | 0.414071 / 0.275898 (0.138173) | 0.429628 / 0.323480 (0.106148) | 0.005151 / 0.007986 (-0.002834) | 0.003979 / 0.004328 (-0.000349) | 0.103209 / 0.004250 (0.098958) | 0.046200 / 0.037052 (0.009148) | 0.414020 / 0.258489 (0.155531) | 0.475748 / 0.293841 (0.181907) | 0.041031 / 0.128546 (-0.087515) | 0.014462 / 0.075646 (-0.061185) | 0.423706 / 0.419271 (0.004434) | 0.063488 / 0.043533 (0.019955) | 0.404937 / 0.255139 (0.149798) | 0.404973 / 0.283200 (0.121773) | 0.114982 / 0.141683 (-0.026701) | 1.911867 / 1.452155 (0.459713) | 1.925274 / 1.492716 (0.432557) |

### 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) | 0.284656 / 0.018006 (0.266650) | 0.588329 / 0.000490 (0.587840) | 0.007092 / 0.000200 (0.006892) | 0.000143 / 0.000054 (0.000089) |

### Benchmark: benchmark_indices_mapping.json

| metric | select | shard | shuffle | sort | train_test_split |
|--------|---|---|---|---|---|
| new / old (diff) | 0.025136 / 0.037411 (-0.012275) | 0.109514 / 0.014526 (0.094988) | 0.117953 / 0.176557 (-0.058603) | 0.195454 / 0.737135 (-0.541682) | 0.134243 / 0.296338 (-0.162096) |

### 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) | 0.584045 / 0.215209 (0.368836) | 6.456922 / 2.077655 (4.379267) | 2.759728 / 1.504120 (1.255608) | 2.260913 / 1.541195 (0.719718) | 2.292535 / 1.468490 (0.824045) | 0.906873 / 4.584777 (-3.677904) | 5.554455 / 3.745712 (1.808743) | 4.881557 / 5.269862 (-0.388305) | 2.509121 / 4.565676 (-2.056555) | 0.107191 / 0.424275 (-0.317084) | 0.014684 / 0.007607 (0.007077) | 0.761625 / 0.226044 (0.535580) | 7.582708 / 2.268929 (5.313780) | 3.150160 / 55.444624 (-52.294464) | 2.792284 / 6.876477 (-4.084193) | 2.881321 / 2.142072 (0.739248) | 1.108353 / 4.805227 (-3.696874) | 0.220129 / 6.500664 (-6.280535) | 0.075877 / 0.075469 (0.000408) |

### 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) | 1.465743 / 1.841788 (-0.376045) | 17.679219 / 8.074308 (9.604911) | 18.929399 / 10.191392 (8.738007) | 0.219488 / 0.680424 (-0.460935) | 0.028435 / 0.534201 (-0.505766) | 0.512623 / 0.579283 (-0.066660) | 0.619983 / 0.434364 (0.185619) | 0.603430 / 0.540337 (0.063092) | 0.730416 / 1.386936 (-0.656520) |

</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) | 0.008285 / 0.011353 (-0.003068) | 0.005771 / 0.011008 (-0.005237) | 0.106444 / 0.038508 (0.067936) | 0.035078 / 0.023109 (0.011969) | 0.441198 / 0.275898 (0.165300) | 0.536279 / 0.323480 (0.212800) | 0.004561 / 0.007986 (-0.003424) | 0.006623 / 0.004328 (0.002294) | 0.102392 / 0.004250 (0.098142) | 0.051736 / 0.037052 (0.014684) | 0.479113 / 0.258489 (0.220624) | 0.535088 / 0.293841 (0.241247) | 0.041805 / 0.128546 (-0.086741) | 0.014031 / 0.075646 (-0.061615) | 0.115795 / 0.419271 (-0.303477) | 0.057913 / 0.043533 (0.014380) | 0.435847 / 0.255139 (0.180708) | 0.524831 / 0.283200 (0.241632) | 0.119419 / 0.141683 (-0.022263) | 1.835577 / 1.452155 (0.383423) | 1.936990 / 1.492716 (0.444273) |

### 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) | 0.288422 / 0.018006 (0.270416) | 0.569776 / 0.000490 (0.569287) | 0.005652 / 0.000200 (0.005452) | 0.000139 / 0.000054 (0.000085) |

### Benchmark: benchmark_indices_mapping.json

| metric | select | shard | shuffle | sort | train_test_split |
|--------|---|---|---|---|---|
| new / old (diff) | 0.034632 / 0.037411 (-0.002779) | 0.136217 / 0.014526 (0.121691) | 0.139468 / 0.176557 (-0.037089) | 0.206804 / 0.737135 (-0.530331) | 0.148733 / 0.296338 (-0.147606) |

### 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) | 0.667728 / 0.215209 (0.452518) | 6.548972 / 2.077655 (4.471317) | 3.051537 / 1.504120 (1.547417) | 2.581173 / 1.541195 (1.039978) | 2.653443 / 1.468490 (1.184953) | 0.906606 / 4.584777 (-3.678171) | 5.704384 / 3.745712 (1.958672) | 2.848618 / 5.269862 (-2.421244) | 1.821402 / 4.565676 (-2.744274) | 0.118018 / 0.424275 (-0.306257) | 0.014821 / 0.007607 (0.007214) | 0.821967 / 0.226044 (0.595923) | 8.165818 / 2.268929 (5.896889) | 3.744509 / 55.444624 (-51.700116) | 2.901097 / 6.876477 (-3.975380) | 3.018068 / 2.142072 (0.875996) | 1.106155 / 4.805227 (-3.699072) | 0.263118 / 6.500664 (-6.237546) | 0.088508 / 0.075469 (0.013039) |

### 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) | 1.725860 / 1.841788 (-0.115928) | 19.411246 / 8.074308 (11.336938) | 20.807499 / 10.191392 (10.616107) | 0.238417 / 0.680424 (-0.442007) | 0.026550 / 0.534201 (-0.507651) | 0.500715 / 0.579283 (-0.078568) | 0.615547 / 0.434364 (0.181183) | 0.614361 / 0.540337 (0.074023) | 0.720365 / 1.386936 (-0.666571) |

</details>
</details>

![](https://cml.dev/watermark.png#ae2e77f8344cdcc1c4c876f67936bec33087b19a "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) | 0.006640 / 0.011353 (-0.004713) | 0.004079 / 0.011008 (-0.006930) | 0.100555 / 0.038508 (0.062046) | 0.037318 / 0.023109 (0.014209) | 0.320050 / 0.275898 (0.044152) | 0.358860 / 0.323480 (0.035380) | 0.003828 / 0.007986 (-0.004158) | 0.003215 / 0.004328 (-0.001113) | 0.076577 / 0.004250 (0.072326) | 0.048080 / 0.037052 (0.011028) | 0.324759 / 0.258489 (0.066270) | 0.361862 / 0.293841 (0.068021) | 0.030759 / 0.128546 (-0.097787) | 0.008998 / 0.075646 (-0.066648) | 0.329105 / 0.419271 (-0.090167) | 0.051407 / 0.043533 (0.007875) | 0.311067 / 0.255139 (0.055928) | 0.334401 / 0.283200 (0.051201) | 0.098307 / 0.141683 (-0.043376) | 1.500931 / 1.452155 (0.048776) | 1.574646 / 1.492716 (0.081930) |

### 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) | 0.219080 / 0.018006 (0.201073) | 0.447117 / 0.000490 (0.446627) | 0.009091 / 0.000200 (0.008891) | 0.000396 / 0.000054 (0.000341) |

### Benchmark: benchmark_indices_mapping.json

| metric | select | shard | shuffle | sort | train_test_split |
|--------|---|---|---|---|---|
| new / old (diff) | 0.026048 / 0.037411 (-0.011363) | 0.112714 / 0.014526 (0.098188) | 0.116426 / 0.176557 (-0.060131) | 0.172187 / 0.737135 (-0.564948) | 0.121707 / 0.296338 (-0.174632) |

### 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) | 0.358898 / 0.215209 (0.143689) | 3.589212 / 2.077655 (1.511557) | 1.677927 / 1.504120 (0.173807) | 1.515861 / 1.541195 (-0.025334) | 1.598479 / 1.468490 (0.129989) | 0.478265 / 4.584777 (-4.106512) | 3.834982 / 3.745712 (0.089270) | 1.933815 / 5.269862 (-3.336047) | 1.122769 / 4.565676 (-3.442908) | 0.066984 / 0.424275 (-0.357291) | 0.011276 / 0.007607 (0.003669) | 0.512530 / 0.226044 (0.286486) | 5.112667 / 2.268929 (2.843739) | 2.266336 / 55.444624 (-53.178288) | 1.929671 / 6.876477 (-4.946806) | 2.127231 / 2.142072 (-0.014842) | 0.671307 / 4.805227 (-4.133920) | 0.143919 / 6.500664 (-6.356745) | 0.066086 / 0.075469 (-0.009383) |

### 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) | 1.208767 / 1.841788 (-0.633021) | 15.008415 / 8.074308 (6.934106) | 14.085442 / 10.191392 (3.894050) | 0.184164 / 0.680424 (-0.496260) | 0.017619 / 0.534201 (-0.516582) | 0.394443 / 0.579283 (-0.184840) | 0.457653 / 0.434364 (0.023289) | 0.473169 / 0.540337 (-0.067169) | 0.571332 / 1.386936 (-0.815604) |

</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) | 0.007009 / 0.011353 (-0.004344) | 0.004330 / 0.011008 (-0.006678) | 0.077462 / 0.038508 (0.038954) | 0.034780 / 0.023109 (0.011671) | 0.395573 / 0.275898 (0.119675) | 0.425444 / 0.323480 (0.101964) | 0.004119 / 0.007986 (-0.003866) | 0.003597 / 0.004328 (-0.000731) | 0.075209 / 0.004250 (0.070958) | 0.050871 / 0.037052 (0.013819) | 0.402990 / 0.258489 (0.144500) | 0.445334 / 0.293841 (0.151493) | 0.032492 / 0.128546 (-0.096054) | 0.009066 / 0.075646 (-0.066581) | 0.083073 / 0.419271 (-0.336198) | 0.051661 / 0.043533 (0.008128) | 0.395207 / 0.255139 (0.140068) | 0.409556 / 0.283200 (0.126356) | 0.106035 / 0.141683 (-0.035648) | 1.506255 / 1.452155 (0.054101) | 1.598724 / 1.492716 (0.106008) |

### 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) | 0.194733 / 0.018006 (0.176727) | 0.444920 / 0.000490 (0.444431) | 0.002402 / 0.000200 (0.002202) | 0.000083 / 0.000054 (0.000028) |

### Benchmark: benchmark_indices_mapping.json

| metric | select | shard | shuffle | sort | train_test_split |
|--------|---|---|---|---|---|
| new / old (diff) | 0.030464 / 0.037411 (-0.006947) | 0.119153 / 0.014526 (0.104627) | 0.126081 / 0.176557 (-0.050476) | 0.179692 / 0.737135 (-0.557444) | 0.131834 / 0.296338 (-0.164504) |

### 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) | 0.440153 / 0.215209 (0.224944) | 4.397504 / 2.077655 (2.319850) | 2.138320 / 1.504120 (0.634200) | 1.950596 / 1.541195 (0.409402) | 2.079792 / 1.468490 (0.611302) | 0.537606 / 4.584777 (-4.047171) | 3.689420 / 3.745712 (-0.056292) | 2.960732 / 5.269862 (-2.309129) | 1.585652 / 4.565676 (-2.980024) | 0.066102 / 0.424275 (-0.358173) | 0.011429 / 0.007607 (0.003821) | 0.537011 / 0.226044 (0.310967) | 5.342171 / 2.268929 (3.073242) | 2.624446 / 55.444624 (-52.820179) | 2.313311 / 6.876477 (-4.563166) | 2.389166 / 2.142072 (0.247094) | 0.657547 / 4.805227 (-4.147681) | 0.141640 / 6.500664 (-6.359025) | 0.066102 / 0.075469 (-0.009367) |

### 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) | 1.130471 / 1.841788 (-0.711317) | 14.824792 / 8.074308 (6.750484) | 13.436463 / 10.191392 (3.245071) | 0.155688 / 0.680424 (-0.524736) | 0.015811 / 0.534201 (-0.518390) | 0.355623 / 0.579283 (-0.223660) | 0.450604 / 0.434364 (0.016241) | 0.472542 / 0.540337 (-0.067796) | 0.563584 / 1.386936 (-0.823352) |

</details>
</details>

![](https://cml.dev/watermark.png#963ff6de6eae80a6de4aabf0092eb3dfbe43096e "CML watermark")