neilconway commented on PR #20317:
URL: https://github.com/apache/datafusion/pull/20317#issuecomment-3891039440
Benchmark results:
```
$ cargo bench --bench concat -- --baseline concat-vanilla
Compiling datafusion-functions v52.1.0
(/Users/neilconway/datafusion/datafusion/functions)
Finished `bench` profile [optimized] target(s) in 46.20s
Running benches/concat.rs (target/release/deps/concat-4233805a3f40f888)
Gnuplot not found, using plotters backend
concat function/concat/1024
time: [10.485 µs 10.510 µs 10.544 µs]
change: [−5.7512% −5.3786% −4.9576%] (p = 0.00 <
0.05)
Performance has improved.
Found 8 outliers among 100 measurements (8.00%)
1 (1.00%) low severe
4 (4.00%) low mild
1 (1.00%) high mild
2 (2.00%) high severe
concat function/concat/4096
time: [39.832 µs 39.896 µs 39.957 µs]
change: [−6.1783% −5.6993% −5.2265%] (p = 0.00 <
0.05)
Performance has improved.
Found 2 outliers among 100 measurements (2.00%)
2 (2.00%) high mild
concat function/concat/8192
time: [79.562 µs 79.690 µs 79.831 µs]
change: [−5.3363% −5.0808% −4.8152%] (p = 0.00 <
0.05)
Performance has improved.
Found 4 outliers among 100 measurements (4.00%)
1 (1.00%) low severe
1 (1.00%) low mild
1 (1.00%) high mild
1 (1.00%) high severe
concat function/concat_view/1024
time: [23.159 µs 23.197 µs 23.236 µs]
change: [−82.546% −82.420% −82.307%] (p = 0.00 <
0.05)
Performance has improved.
Found 5 outliers among 100 measurements (5.00%)
1 (1.00%) low severe
3 (3.00%) low mild
1 (1.00%) high mild
concat function/concat_view/4096
time: [97.326 µs 97.967 µs 98.620 µs]
change: [−81.132% −81.027% −80.908%] (p = 0.00 <
0.05)
Performance has improved.
Found 8 outliers among 100 measurements (8.00%)
1 (1.00%) low severe
7 (7.00%) high mild
concat function/concat_view/8192
time: [206.99 µs 207.77 µs 208.67 µs]
change: [−80.382% −80.269% −80.158%] (p = 0.00 <
0.05)
Performance has improved.
concat function/concat/scalar
time: [1.0204 µs 1.0226 µs 1.0249 µs]
change: [−0.7254% −0.4513% −0.2078%] (p = 0.00 <
0.05)
Change within noise threshold.
Found 6 outliers among 100 measurements (6.00%)
2 (2.00%) low severe
2 (2.00%) low mild
2 (2.00%) high mild
```
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