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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) | 0.005076 / 0.011353 (-0.006277) | 0.003424 / 0.011008 (-0.007584) | 0.064195 / 0.038508 (0.025687) | 0.031742 / 0.023109 (0.008633) | 0.244774 / 0.275898 (-0.031124) | 0.268529 / 0.323480 (-0.054951) | 0.003970 / 0.007986 (-0.004016) | 0.002657 / 0.004328 (-0.001672) | 0.048847 / 0.004250 (0.044597) | 0.042196 / 0.037052 (0.005144) | 0.266044 / 0.258489 (0.007555) | 0.282400 / 0.293841 (-0.011441) | 0.027617 / 0.128546 (-0.100929) | 0.010400 / 0.075646 (-0.065246) | 0.205910 / 0.419271 (-0.213362) | 0.035820 / 0.043533 (-0.007713) | 0.247750 / 0.255139 (-0.007389) | 0.267318 / 0.283200 (-0.015882) | 0.017980 / 0.141683 (-0.123703) | 1.107263 / 1.452155 (-0.344892) | 1.173208 / 1.492716 (-0.319509) |

### 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) | 0.095830 / 0.018006 (0.077824) | 0.293891 / 0.000490 (0.293401) | 0.000257 / 0.000200 (0.000057) | 0.000052 / 0.000054 (-0.000002) |

### Benchmark: benchmark_indices_mapping.json

| metric | select | shard | shuffle | sort | train_test_split |
|--------|---|---|---|---|---|
| new / old (diff) | 0.018138 / 0.037411 (-0.019273) | 0.061631 / 0.014526 (0.047105) | 0.073038 / 0.176557 (-0.103519) | 0.118317 / 0.737135 (-0.618818) | 0.074190 / 0.296338 (-0.222148) |

### 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) | 0.287026 / 0.215209 (0.071817) | 2.786137 / 2.077655 (0.708482) | 1.472575 / 1.504120 (-0.031544) | 1.346919 / 1.541195 (-0.194276) | 1.388535 / 1.468490 (-0.079955) | 0.565731 / 4.584777 (-4.019046) | 2.382573 / 3.745712 (-1.363139) | 2.736926 / 5.269862 (-2.532935) | 1.716517 / 4.565676 (-2.849159) | 0.062168 / 0.424275 (-0.362108) | 0.004924 / 0.007607 (-0.002683) | 0.341897 / 0.226044 (0.115853) | 3.355715 / 2.268929 (1.086787) | 1.837014 / 55.444624 (-53.607611) | 1.532063 / 6.876477 (-5.344414) | 1.548193 / 2.142072 (-0.593880) | 0.634995 / 4.805227 (-4.170232) | 0.115622 / 6.500664 (-6.385042) | 0.042252 / 0.075469 (-0.033217) |

### 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) | 0.970713 / 1.841788 (-0.871075) | 11.727576 / 8.074308 (3.653268) | 9.806524 / 10.191392 (-0.384868) | 0.127622 / 0.680424 (-0.552802) | 0.014140 / 0.534201 (-0.520061) | 0.286832 / 0.579283 (-0.292451) | 0.266556 / 0.434364 (-0.167808) | 0.325940 / 0.540337 (-0.214398) | 0.421839 / 1.386936 (-0.965097) |

</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) | 0.005495 / 0.011353 (-0.005858) | 0.003676 / 0.011008 (-0.007332) | 0.054361 / 0.038508 (0.015853) | 0.030743 / 0.023109 (0.007633) | 0.277200 / 0.275898 (0.001302) | 0.313459 / 0.323480 (-0.010021) | 0.004316 / 0.007986 (-0.003670) | 0.002750 / 0.004328 (-0.001578) | 0.049491 / 0.004250 (0.045241) | 0.044268 / 0.037052 (0.007215) | 0.292529 / 0.258489 (0.034039) | 0.326524 / 0.293841 (0.032683) | 0.048040 / 0.128546 (-0.080507) | 0.010390 / 0.075646 (-0.065256) | 0.058459 / 0.419271 (-0.360813) | 0.033765 / 0.043533 (-0.009768) | 0.276003 / 0.255139 (0.020864) | 0.297299 / 0.283200 (0.014099) | 0.018532 / 0.141683 (-0.123151) | 1.157639 / 1.452155 (-0.294515) | 1.220492 / 1.492716 (-0.272225) |

### 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) | 0.093903 / 0.018006 (0.075897) | 0.303005 / 0.000490 (0.302515) | 0.000224 / 0.000200 (0.000024) | 0.000051 / 0.000054 (-0.000003) |

### Benchmark: benchmark_indices_mapping.json

| metric | select | shard | shuffle | sort | train_test_split |
|--------|---|---|---|---|---|
| new / old (diff) | 0.021580 / 0.037411 (-0.015831) | 0.076176 / 0.014526 (0.061650) | 0.086998 / 0.176557 (-0.089558) | 0.124148 / 0.737135 (-0.612987) | 0.088613 / 0.296338 (-0.207725) |

### 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) | 0.300623 / 0.215209 (0.085414) | 2.911876 / 2.077655 (0.834221) | 1.588398 / 1.504120 (0.084278) | 1.471251 / 1.541195 (-0.069944) | 1.505528 / 1.468490 (0.037038) | 0.570635 / 4.584777 (-4.014142) | 2.485769 / 3.745712 (-1.259943) | 2.785355 / 5.269862 (-2.484507) | 1.752944 / 4.565676 (-2.812732) | 0.063146 / 0.424275 (-0.361129) | 0.004980 / 0.007607 (-0.002627) | 0.354577 / 0.226044 (0.128532) | 3.477181 / 2.268929 (1.208253) | 1.951906 / 55.444624 (-53.492718) | 1.677169 / 6.876477 (-5.199307) | 1.686338 / 2.142072 (-0.455735) | 0.637156 / 4.805227 (-4.168071) | 0.117732 / 6.500664 (-6.382932) | 0.041091 / 0.075469 (-0.034378) |

### 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) | 1.010071 / 1.841788 (-0.831717) | 12.172242 / 8.074308 (4.097934) | 10.422811 / 10.191392 (0.231419) | 0.137185 / 0.680424 (-0.543239) | 0.014643 / 0.534201 (-0.519558) | 0.287248 / 0.579283 (-0.292035) | 0.272779 / 0.434364 (-0.161585) | 0.331761 / 0.540337 (-0.208576) | 0.417266 / 1.386936 (-0.969670) |

</details>
</details>

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