Issue: Faster `xlistdir`
State: closed
Author: mariosasko

Pass `detail=False` to the `fsspec` `listdir`  to avoid unnecessarily fetching expensive metadata about the paths.

Comments:
The docs for this PR live [here](https://moon-ci-docs.huggingface.co/docs/datasets/pr_6698). All of your documentation changes will be reflected on that endpoint. The docs are available until 30 days after the last update.

CI failure is unrelated to the changes.

<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) | 0.005499 / 0.011353 (-0.005854) | 0.003824 / 0.011008 (-0.007184) | 0.064230 / 0.038508 (0.025722) | 0.028962 / 0.023109 (0.005853) | 0.283540 / 0.275898 (0.007642) | 0.300774 / 0.323480 (-0.022706) | 0.003405 / 0.007986 (-0.004581) | 0.002796 / 0.004328 (-0.001532) | 0.049834 / 0.004250 (0.045584) | 0.045924 / 0.037052 (0.008872) | 0.274818 / 0.258489 (0.016328) | 0.306189 / 0.293841 (0.012348) | 0.028304 / 0.128546 (-0.100242) | 0.011496 / 0.075646 (-0.064150) | 0.208236 / 0.419271 (-0.211036) | 0.035720 / 0.043533 (-0.007813) | 0.261190 / 0.255139 (0.006051) | 0.281545 / 0.283200 (-0.001655) | 0.019388 / 0.141683 (-0.122295) | 1.134999 / 1.452155 (-0.317156) | 1.203053 / 1.492716 (-0.289663) |

### 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) | 0.096007 / 0.018006 (0.078000) | 0.316958 / 0.000490 (0.316469) | 0.000210 / 0.000200 (0.000010) | 0.000053 / 0.000054 (-0.000001) |

### Benchmark: benchmark_indices_mapping.json

| metric | select | shard | shuffle | sort | train_test_split |
|--------|---|---|---|---|---|
| new / old (diff) | 0.018330 / 0.037411 (-0.019081) | 0.063299 / 0.014526 (0.048773) | 0.073833 / 0.176557 (-0.102723) | 0.122285 / 0.737135 (-0.614850) | 0.077352 / 0.296338 (-0.218987) |

### 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) | 0.304487 / 0.215209 (0.089278) | 3.017666 / 2.077655 (0.940012) | 1.664292 / 1.504120 (0.160172) | 1.448446 / 1.541195 (-0.092748) | 1.435612 / 1.468490 (-0.032878) | 0.569704 / 4.584777 (-4.015073) | 2.362015 / 3.745712 (-1.383698) | 2.910380 / 5.269862 (-2.359481) | 1.814560 / 4.565676 (-2.751116) | 0.063986 / 0.424275 (-0.360289) | 0.005022 / 0.007607 (-0.002585) | 0.363528 / 0.226044 (0.137483) | 3.641940 / 2.268929 (1.373011) | 1.961589 / 55.444624 (-53.483035) | 1.603683 / 6.876477 (-5.272793) | 1.663144 / 2.142072 (-0.478928) | 0.645628 / 4.805227 (-4.159599) | 0.118759 / 6.500664 (-6.381905) | 0.042631 / 0.075469 (-0.032838) |

### 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) | 0.985648 / 1.841788 (-0.856140) | 13.082558 / 8.074308 (5.008250) | 9.909811 / 10.191392 (-0.281581) | 0.131340 / 0.680424 (-0.549083) | 0.013983 / 0.534201 (-0.520218) | 0.289869 / 0.579283 (-0.289414) | 0.271775 / 0.434364 (-0.162589) | 0.334853 / 0.540337 (-0.205485) | 0.457017 / 1.386936 (-0.929919) |

</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) | 0.005580 / 0.011353 (-0.005773) | 0.003788 / 0.011008 (-0.007221) | 0.049401 / 0.038508 (0.010893) | 0.030372 / 0.023109 (0.007263) | 0.278554 / 0.275898 (0.002655) | 0.302462 / 0.323480 (-0.021018) | 0.004412 / 0.007986 (-0.003573) | 0.002825 / 0.004328 (-0.001504) | 0.047826 / 0.004250 (0.043576) | 0.047903 / 0.037052 (0.010851) | 0.293098 / 0.258489 (0.034609) | 0.322777 / 0.293841 (0.028936) | 0.030010 / 0.128546 (-0.098536) | 0.011187 / 0.075646 (-0.064459) | 0.057639 / 0.419271 (-0.361632) | 0.059693 / 0.043533 (0.016160) | 0.280288 / 0.255139 (0.025149) | 0.294022 / 0.283200 (0.010823) | 0.019635 / 0.141683 (-0.122048) | 1.154733 / 1.452155 (-0.297422) | 1.200808 / 1.492716 (-0.291908) |

### 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) | 0.099682 / 0.018006 (0.081676) | 0.319521 / 0.000490 (0.319031) | 0.000224 / 0.000200 (0.000024) | 0.000053 / 0.000054 (-0.000001) |

### Benchmark: benchmark_indices_mapping.json

| metric | select | shard | shuffle | sort | train_test_split |
|--------|---|---|---|---|---|
| new / old (diff) | 0.022042 / 0.037411 (-0.015370) | 0.078842 / 0.014526 (0.064317) | 0.088715 / 0.176557 (-0.087841) | 0.126832 / 0.737135 (-0.610303) | 0.089217 / 0.296338 (-0.207122) |

### 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) | 0.300099 / 0.215209 (0.084890) | 2.907746 / 2.077655 (0.830092) | 1.619418 / 1.504120 (0.115298) | 1.495693 / 1.541195 (-0.045501) | 1.544956 / 1.468490 (0.076466) | 0.556652 / 4.584777 (-4.028124) | 2.414408 / 3.745712 (-1.331304) | 2.737227 / 5.269862 (-2.532635) | 1.763187 / 4.565676 (-2.802490) | 0.062207 / 0.424275 (-0.362069) | 0.005076 / 0.007607 (-0.002531) | 0.349880 / 0.226044 (0.123836) | 3.425355 / 2.268929 (1.156427) | 1.972094 / 55.444624 (-53.472531) | 1.710650 / 6.876477 (-5.165827) | 1.902218 / 2.142072 (-0.239855) | 0.640699 / 4.805227 (-4.164529) | 0.117879 / 6.500664 (-6.382785) | 0.042412 / 0.075469 (-0.033057) |

### 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) | 1.030131 / 1.841788 (-0.811656) | 12.750637 / 8.074308 (4.676329) | 10.352636 / 10.191392 (0.161244) | 0.141139 / 0.680424 (-0.539285) | 0.015343 / 0.534201 (-0.518858) | 0.294931 / 0.579283 (-0.284352) | 0.275237 / 0.434364 (-0.159127) | 0.336669 / 0.540337 (-0.203668) | 0.429945 / 1.386936 (-0.956991) |

</details>
</details>

![](https://cml.dev/watermark.png#9c424fa517a1b8517c89545f979e0c8c7d90c3e3 "CML watermark")