Issue: Shorten long logs
State: closed
Author: lhoestq

Some datasets may have unexpectedly long features/types (e.g. if the files are not formatted correctly).

In that case we should still be able to log something readable

Comments:
The docs for this PR live [here](https://moon-ci-docs.huggingface.co/docs/datasets/pr_6875). All of your documentation changes will be reflected on that endpoint. The docs are available until 30 days after the last update.

<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) | 0.005191 / 0.011353 (-0.006162) | 0.003691 / 0.011008 (-0.007317) | 0.063511 / 0.038508 (0.025003) | 0.031849 / 0.023109 (0.008740) | 0.251691 / 0.275898 (-0.024207) | 0.276585 / 0.323480 (-0.046895) | 0.004080 / 0.007986 (-0.003906) | 0.002751 / 0.004328 (-0.001577) | 0.049572 / 0.004250 (0.045322) | 0.043010 / 0.037052 (0.005957) | 0.267161 / 0.258489 (0.008672) | 0.301054 / 0.293841 (0.007213) | 0.028068 / 0.128546 (-0.100479) | 0.010479 / 0.075646 (-0.065167) | 0.208458 / 0.419271 (-0.210814) | 0.035688 / 0.043533 (-0.007845) | 0.255985 / 0.255139 (0.000846) | 0.296016 / 0.283200 (0.012817) | 0.017041 / 0.141683 (-0.124642) | 1.168626 / 1.452155 (-0.283528) | 1.173419 / 1.492716 (-0.319297) |

### 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) | 0.092975 / 0.018006 (0.074969) | 0.302309 / 0.000490 (0.301820) | 0.000219 / 0.000200 (0.000020) | 0.000042 / 0.000054 (-0.000012) |

### Benchmark: benchmark_indices_mapping.json

| metric | select | shard | shuffle | sort | train_test_split |
|--------|---|---|---|---|---|
| new / old (diff) | 0.018809 / 0.037411 (-0.018602) | 0.062606 / 0.014526 (0.048080) | 0.073820 / 0.176557 (-0.102736) | 0.119451 / 0.737135 (-0.617684) | 0.075086 / 0.296338 (-0.221253) |

### 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) | 0.280342 / 0.215209 (0.065133) | 2.742477 / 2.077655 (0.664822) | 1.409221 / 1.504120 (-0.094899) | 1.291679 / 1.541195 (-0.249516) | 1.316628 / 1.468490 (-0.151862) | 0.554942 / 4.584777 (-4.029835) | 2.363301 / 3.745712 (-1.382411) | 2.775766 / 5.269862 (-2.494096) | 1.729123 / 4.565676 (-2.836554) | 0.061254 / 0.424275 (-0.363021) | 0.005444 / 0.007607 (-0.002163) | 0.330450 / 0.226044 (0.104406) | 3.249453 / 2.268929 (0.980524) | 1.782415 / 55.444624 (-53.662210) | 1.489778 / 6.876477 (-5.386699) | 1.521809 / 2.142072 (-0.620263) | 0.626622 / 4.805227 (-4.178605) | 0.117320 / 6.500664 (-6.383344) | 0.043110 / 0.075469 (-0.032359) |

### 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) | 0.981954 / 1.841788 (-0.859834) | 11.706373 / 8.074308 (3.632064) | 9.870815 / 10.191392 (-0.320577) | 0.141768 / 0.680424 (-0.538656) | 0.014455 / 0.534201 (-0.519746) | 0.287451 / 0.579283 (-0.291832) | 0.264559 / 0.434364 (-0.169805) | 0.326321 / 0.540337 (-0.214017) | 0.424084 / 1.386936 (-0.962852) |

</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) | 0.005461 / 0.011353 (-0.005892) | 0.003804 / 0.011008 (-0.007204) | 0.049872 / 0.038508 (0.011364) | 0.029543 / 0.023109 (0.006433) | 0.260772 / 0.275898 (-0.015126) | 0.291571 / 0.323480 (-0.031909) | 0.004305 / 0.007986 (-0.003681) | 0.002845 / 0.004328 (-0.001484) | 0.049129 / 0.004250 (0.044879) | 0.040743 / 0.037052 (0.003690) | 0.276497 / 0.258489 (0.018008) | 0.303126 / 0.293841 (0.009285) | 0.030423 / 0.128546 (-0.098123) | 0.010660 / 0.075646 (-0.064986) | 0.058857 / 0.419271 (-0.360415) | 0.033185 / 0.043533 (-0.010348) | 0.260452 / 0.255139 (0.005313) | 0.282648 / 0.283200 (-0.000552) | 0.018025 / 0.141683 (-0.123658) | 1.147432 / 1.452155 (-0.304723) | 1.192034 / 1.492716 (-0.300683) |

### 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) | 0.093094 / 0.018006 (0.075088) | 0.301608 / 0.000490 (0.301119) | 0.000209 / 0.000200 (0.000009) | 0.000044 / 0.000054 (-0.000010) |

### Benchmark: benchmark_indices_mapping.json

| metric | select | shard | shuffle | sort | train_test_split |
|--------|---|---|---|---|---|
| new / old (diff) | 0.022071 / 0.037411 (-0.015340) | 0.075244 / 0.014526 (0.060718) | 0.087157 / 0.176557 (-0.089400) | 0.127339 / 0.737135 (-0.609797) | 0.088527 / 0.296338 (-0.207812) |

### 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) | 0.293033 / 0.215209 (0.077824) | 2.839842 / 2.077655 (0.762188) | 1.544730 / 1.504120 (0.040610) | 1.421727 / 1.541195 (-0.119468) | 1.446054 / 1.468490 (-0.022436) | 0.573285 / 4.584777 (-4.011492) | 0.980977 / 3.745712 (-2.764735) | 2.829034 / 5.269862 (-2.440828) | 1.800747 / 4.565676 (-2.764930) | 0.064916 / 0.424275 (-0.359360) | 0.005099 / 0.007607 (-0.002508) | 0.348054 / 0.226044 (0.122009) | 3.449111 / 2.268929 (1.180182) | 1.900115 / 55.444624 (-53.544509) | 1.620564 / 6.876477 (-5.255913) | 1.675474 / 2.142072 (-0.466598) | 0.652302 / 4.805227 (-4.152925) | 0.118438 / 6.500664 (-6.382226) | 0.041779 / 0.075469 (-0.033690) |

### 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) | 1.003703 / 1.841788 (-0.838085) | 12.466921 / 8.074308 (4.392613) | 9.800419 / 10.191392 (-0.390973) | 0.131567 / 0.680424 (-0.548856) | 0.015684 / 0.534201 (-0.518517) | 0.288754 / 0.579283 (-0.290530) | 0.126435 / 0.434364 (-0.307929) | 0.398608 / 0.540337 (-0.141729) | 0.427043 / 1.386936 (-0.959894) |

</details>
</details>

![](https://cml.dev/watermark.png#865e9b1f2ecbe934be49a2d8d46451aba4af3485 "CML watermark")