alamb commented on PR #7650:
URL: https://github.com/apache/arrow-rs/pull/7650#issuecomment-2977865411
Here are three runs on main on my gcp VM:
```
alamb@aal-dev:~/arrow-rs$ cargo bench --bench coalesce_kernels --
'mixed_utf8, 8192, nulls: 0, selectivity: 0.8'
..
filter: mixed_utf8, 8192, nulls: 0, selectivity: 0.8
time: [8.0962 ms 8.1297 ms 8.1635 ms]
...
filter: mixed_utf8, 8192, nulls: 0, selectivity: 0.8
time: [7.9674 ms 7.9984 ms 8.0300 ms]
...
time: [8.2022 ms 8.2490 ms 8.2975 ms]
change: [+2.4166% +3.1325% +3.8706%] (p = 0.00 <
0.05)
...
```
Hera are three runs on this branch (basically the same, I can't reproduce
the different numbers) 🤔
```
Running benches/coalesce_kernels.rs
(target/release/deps/coalesce_kernels-57e0af298c8ccbf1)
filter: mixed_utf8, 8192, nulls: 0, selectivity: 0.8
time: [8.1231 ms 8.1549 ms 8.1878 ms]
change: [−1.8215% −1.1398% −0.4447%] (p = 0.00 <
0.05)
Change within noise threshold.
Found 1 outliers among 100 measurements (1.00%)
1 (1.00%) high mild
alamb@aal-dev:~/arrow-rs$ cargo bench --bench coalesce_kernels --
'mixed_utf8, 8192, nulls: 0, selectivity: 0.8' && cargo bench --bench
coalesce_kernels -- 'mixed_utf8, 8192, nulls: 0, selectivity: 0.8'
Finished `bench` profile [optimized] target(s) in 0.17s
Running benches/coalesce_kernels.rs
(target/release/deps/coalesce_kernels-57e0af298c8ccbf1)
filter: mixed_utf8, 8192, nulls: 0, selectivity: 0.8
time: [8.2279 ms 8.2742 ms 8.3229 ms]
change: [+0.7339% +1.4627% +2.1941%] (p = 0.00 <
0.05)
Change within noise threshold.
Found 6 outliers among 100 measurements (6.00%)
5 (5.00%) high mild
1 (1.00%) high severe
Finished `bench` profile [optimized] target(s) in 0.17s
Running benches/coalesce_kernels.rs
(target/release/deps/coalesce_kernels-57e0af298c8ccbf1)
filter: mixed_utf8, 8192, nulls: 0, selectivity: 0.8
time: [8.1797 ms 8.2236 ms 8.2693 ms]
change: [−1.4209% −0.6114% +0.1819%] (p = 0.13 >
0.05)
No change in performance detected.
Found 1 outliers among 100 measurements (1.00%)
1 (1.00%) high mild
```
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