rluvaton commented on PR #8658:
URL: https://github.com/apache/arrow-rs/pull/8658#issuecomment-3423673690
Yes, I committed the benchmark I tested with
| Slice Length | Repetitions (n) | repeat_slice_n_times | extend_from_slice
loop | Speedup |
|--------------|-----------------|----------------------|------------------------|---------|
| 3 | 3 | 47.092 ns | 41.910 ns
| 0.89x |
| 3 | 64 | 63.548 ns | 222.29 ns
| 3.50x |
| 3 | 1024 | 105.57 ns | 3.031 µs
| 28.7x |
| 3 | 8192 | 405.71 ns | 24.170 µs
| 59.6x |
| 20 | 3 | 48.437 ns | 46.437 ns
| 0.96x |
| 20 | 64 | 74.993 ns | 319.04 ns
| 4.25x |
| 20 | 1024 | 350.94 ns | 4.437 µs
| 12.6x |
| 20 | 8192 | 2.440 µs | 35.524 µs
| 14.6x |
| 100 | 3 | 50.369 ns | 47.568 ns
| 0.94x |
| 100 | 64 | 119.70 ns | 165.37 ns
| 1.38x |
| 100 | 1024 | 1.734 µs | 2.623 µs
| 1.51x |
| 100 | 8192 | 10.615 µs | 19.750 µs
| 1.86x |
these are the results:
<details>
<summary>Result</summary>
```
MutableBuffer repeat slice/repeat_slice_n_times/slice_len=3 n=3
time: [46.719 ns 47.092 ns 47.453 ns]
Found 2 outliers among 100 measurements (2.00%)
1 (1.00%) low mild
1 (1.00%) high mild
MutableBuffer repeat slice/extend_from_slice loop/slice_len=3 n=3
time: [41.833 ns 41.910 ns 41.996 ns]
Found 11 outliers among 100 measurements (11.00%)
9 (9.00%) high mild
2 (2.00%) high severe
MutableBuffer repeat slice/repeat_slice_n_times/slice_len=3 n=64
time: [62.935 ns 63.548 ns 64.183 ns]
Found 5 outliers among 100 measurements (5.00%)
5 (5.00%) high mild
MutableBuffer repeat slice/extend_from_slice loop/slice_len=3 n=64
time: [221.75 ns 222.29 ns 222.86 ns]
Found 5 outliers among 100 measurements (5.00%)
3 (3.00%) high mild
2 (2.00%) high severe
MutableBuffer repeat slice/repeat_slice_n_times/slice_len=3 n=1024
time: [105.15 ns 105.57 ns 106.01 ns]
Found 1 outliers among 100 measurements (1.00%)
1 (1.00%) high severe
MutableBuffer repeat slice/extend_from_slice loop/slice_len=3 n=1024
time: [3.0240 µs 3.0308 µs 3.0395 µs]
Found 11 outliers among 100 measurements (11.00%)
2 (2.00%) low mild
5 (5.00%) high mild
4 (4.00%) high severe
MutableBuffer repeat slice/repeat_slice_n_times/slice_len=3 n=8192
time: [401.57 ns 405.71 ns 409.94 ns]
Found 6 outliers among 100 measurements (6.00%)
6 (6.00%) high mild
MutableBuffer repeat slice/extend_from_slice loop/slice_len=3 n=8192
time: [24.124 µs 24.170 µs 24.222 µs]
Found 5 outliers among 100 measurements (5.00%)
3 (3.00%) high mild
2 (2.00%) high severe
MutableBuffer repeat slice/repeat_slice_n_times/slice_len=20 n=3
time: [48.287 ns 48.437 ns 48.606 ns]
Found 8 outliers among 100 measurements (8.00%)
5 (5.00%) high mild
3 (3.00%) high severe
MutableBuffer repeat slice/extend_from_slice loop/slice_len=20 n=3
time: [46.289 ns 46.437 ns 46.611 ns]
Found 6 outliers among 100 measurements (6.00%)
3 (3.00%) high mild
3 (3.00%) high severe
MutableBuffer repeat slice/repeat_slice_n_times/slice_len=20 n=64
time: [74.625 ns 74.993 ns 75.395 ns]
Found 3 outliers among 100 measurements (3.00%)
3 (3.00%) high mild
MutableBuffer repeat slice/extend_from_slice loop/slice_len=20 n=64
time: [318.20 ns 319.04 ns 319.98 ns]
Found 8 outliers among 100 measurements (8.00%)
3 (3.00%) high mild
5 (5.00%) high severe
MutableBuffer repeat slice/repeat_slice_n_times/slice_len=20 n=1024
time: [346.66 ns 350.94 ns 355.17 ns]
Found 3 outliers among 100 measurements (3.00%)
1 (1.00%) low mild
2 (2.00%) high severe
MutableBuffer repeat slice/extend_from_slice loop/slice_len=20 n=1024
time: [4.4251 µs 4.4369 µs 4.4506 µs]
Found 8 outliers among 100 measurements (8.00%)
1 (1.00%) low mild
2 (2.00%) high mild
5 (5.00%) high severe
MutableBuffer repeat slice/repeat_slice_n_times/slice_len=20 n=8192
time: [2.4336 µs 2.4401 µs 2.4465 µs]
Found 2 outliers among 100 measurements (2.00%)
1 (1.00%) high mild
1 (1.00%) high severe
MutableBuffer repeat slice/extend_from_slice loop/slice_len=20 n=8192
time: [35.466 µs 35.524 µs 35.589 µs]
Found 4 outliers among 100 measurements (4.00%)
1 (1.00%) low mild
2 (2.00%) high mild
1 (1.00%) high severe
MutableBuffer repeat slice/repeat_slice_n_times/slice_len=100 n=3
time: [50.209 ns 50.369 ns 50.530 ns]
Found 5 outliers among 100 measurements (5.00%)
5 (5.00%) high mild
MutableBuffer repeat slice/extend_from_slice loop/slice_len=100 n=3
time: [47.439 ns 47.568 ns 47.701 ns]
Found 2 outliers among 100 measurements (2.00%)
2 (2.00%) high mild
MutableBuffer repeat slice/repeat_slice_n_times/slice_len=100 n=64
time: [117.77 ns 119.70 ns 122.00 ns]
Found 12 outliers among 100 measurements (12.00%)
7 (7.00%) high mild
5 (5.00%) high severe
MutableBuffer repeat slice/extend_from_slice loop/slice_len=100 n=64
time: [164.88 ns 165.37 ns 166.07 ns]
Found 6 outliers among 100 measurements (6.00%)
5 (5.00%) high mild
1 (1.00%) high severe
MutableBuffer repeat slice/repeat_slice_n_times/slice_len=100 n=1024
time: [1.7278 µs 1.7335 µs 1.7398 µs]
Found 7 outliers among 100 measurements (7.00%)
1 (1.00%) low mild
5 (5.00%) high mild
1 (1.00%) high severe
MutableBuffer repeat slice/extend_from_slice loop/slice_len=100 n=1024
time: [2.6176 µs 2.6232 µs 2.6305 µs]
Found 5 outliers among 100 measurements (5.00%)
1 (1.00%) high mild
4 (4.00%) high severe
MutableBuffer repeat slice/repeat_slice_n_times/slice_len=100 n=8192
time: [10.583 µs 10.615 µs 10.649 µs]
Found 3 outliers among 100 measurements (3.00%)
3 (3.00%) high mild
MutableBuffer repeat slice/extend_from_slice loop/slice_len=100 n=8192
time: [19.471 µs 19.750 µs 20.185 µs]
Found 9 outliers among 100 measurements (9.00%)
2 (2.00%) high mild
7 (7.00%) high severe
```
</details>
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