neilconway commented on PR #20295:
URL: https://github.com/apache/datafusion/pull/20295#issuecomment-3885986111
Benchmark results:
```
$ cargo bench --bench strpos -- --baseline strpos-vanilla
Compiling datafusion-functions v52.1.0
(/Users/neilconway/datafusion/datafusion/functions)
Finished `bench` profile [optimized] target(s) in 49.54s
Running benches/strpos.rs (target/release/deps/strpos-276a7f6d948782b8)
Gnuplot not found, using plotters backend
strpos_StringArray_ascii_str_len_8
time: [70.568 µs 70.979 µs 71.399 µs]
change: [−42.408% −42.154% −41.895%] (p = 0.00 <
0.05)
Performance has improved.
strpos_StringArray_utf8_str_len_8
time: [139.70 µs 139.98 µs 140.24 µs]
change: [−2.8251% −2.5080% −2.2091%] (p = 0.00 <
0.05)
Performance has improved.
Found 3 outliers among 100 measurements (3.00%)
2 (2.00%) low mild
1 (1.00%) high mild
strpos_StringViewArray_ascii_str_len_8
time: [84.823 µs 85.501 µs 86.164 µs]
change: [−36.379% −35.942% −35.475%] (p = 0.00 <
0.05)
Performance has improved.
Found 10 outliers among 100 measurements (10.00%)
1 (1.00%) high mild
9 (9.00%) high severe
strpos_StringViewArray_utf8_str_len_8
time: [149.49 µs 149.70 µs 149.91 µs]
change: [−1.3145% −1.0960% −0.8604%] (p = 0.00 <
0.05)
Change within noise threshold.
Found 1 outliers among 100 measurements (1.00%)
1 (1.00%) high mild
strpos_StringArray_ascii_str_len_32
time: [88.618 µs 88.681 µs 88.746 µs]
change: [−59.156% −59.095% −59.039%] (p = 0.00 <
0.05)
Performance has improved.
Found 3 outliers among 100 measurements (3.00%)
1 (1.00%) low severe
2 (2.00%) high mild
strpos_StringArray_utf8_str_len_32
time: [288.50 µs 288.98 µs 289.65 µs]
change: [−0.7910% −0.6439% −0.4836%] (p = 0.00 <
0.05)
Change within noise threshold.
Found 10 outliers among 100 measurements (10.00%)
1 (1.00%) low severe
1 (1.00%) low mild
5 (5.00%) high mild
3 (3.00%) high severe
strpos_StringViewArray_ascii_str_len_32
time: [103.70 µs 103.83 µs 103.98 µs]
change: [−55.373% −55.209% −55.040%] (p = 0.00 <
0.05)
Performance has improved.
Found 19 outliers among 100 measurements (19.00%)
1 (1.00%) low severe
11 (11.00%) high mild
7 (7.00%) high severe
strpos_StringViewArray_utf8_str_len_32
time: [311.17 µs 311.76 µs 312.27 µs]
change: [+0.9177% +1.1383% +1.3431%] (p = 0.00 <
0.05)
Change within noise threshold.
Found 1 outliers among 100 measurements (1.00%)
1 (1.00%) low mild
strpos_StringArray_ascii_str_len_128
time: [135.59 µs 136.00 µs 136.40 µs]
change: [−79.902% −79.847% −79.794%] (p = 0.00 <
0.05)
Performance has improved.
Benchmarking strpos_StringArray_utf8_str_len_128: Warming up for 3.0000 s
Warning: Unable to complete 100 samples in 5.0s. You may wish to increase
target time to 6.3s, enable flat sampling, or reduce sample count to 60.
strpos_StringArray_utf8_str_len_128
time: [1.2347 ms 1.2360 ms 1.2373 ms]
change: [−1.2792% −1.1145% −0.9587%] (p = 0.00 <
0.05)
Change within noise threshold.
Found 3 outliers among 100 measurements (3.00%)
3 (3.00%) low mild
strpos_StringViewArray_ascii_str_len_128
time: [173.34 µs 177.51 µs 181.56 µs]
change: [−74.843% −74.464% −74.023%] (p = 0.00 <
0.05)
Performance has improved.
Benchmarking strpos_StringViewArray_utf8_str_len_128: Warming up for 3.0000 s
Warning: Unable to complete 100 samples in 5.0s. You may wish to increase
target time to 6.3s, enable flat sampling, or reduce sample count to 60.
strpos_StringViewArray_utf8_str_len_128
time: [1.2400 ms 1.2414 ms 1.2428 ms]
change: [−1.4076% −1.2513% −1.0985%] (p = 0.00 <
0.05)
Performance has improved.
Found 1 outliers among 100 measurements (1.00%)
1 (1.00%) low mild
strpos_StringArray_ascii_str_len_4096
time: [4.4126 ms 4.4207 ms 4.4292 ms]
change: [−76.979% −76.930% −76.887%] (p = 0.00 <
0.05)
Performance has improved.
Found 3 outliers among 100 measurements (3.00%)
1 (1.00%) low mild
1 (1.00%) high mild
1 (1.00%) high severe
strpos_StringArray_utf8_str_len_4096
time: [36.033 ms 36.097 ms 36.179 ms]
change: [−1.2339% −1.0242% −0.7534%] (p = 0.00 <
0.05)
Change within noise threshold.
Found 2 outliers among 100 measurements (2.00%)
2 (2.00%) high severe
strpos_StringViewArray_ascii_str_len_4096
time: [4.6480 ms 4.6559 ms 4.6643 ms]
change: [−75.980% −75.938% −75.899%] (p = 0.00 <
0.05)
Performance has improved.
Found 2 outliers among 100 measurements (2.00%)
1 (1.00%) low mild
1 (1.00%) high severe
strpos_StringViewArray_utf8_str_len_4096
time: [36.095 ms 36.134 ms 36.173 ms]
change: [−1.0341% −0.9052% −0.7789%] (p = 0.00 <
0.05)
Change within noise threshold.
```
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