Integrated: 8303401: Add a Vector API equalsIgnoreCase micro benchmark
Eirik Bjorsnos
duke at openjdk.org
Wed Mar 1 18:22:23 UTC 2023
On Tue, 28 Feb 2023 15:59:26 GMT, Eirik Bjorsnos <duke at openjdk.org> wrote:
> This PR suggests we add a vectorized equalsIgnoreCase benchmark to the set of benchmarks in `org.openjdk.bench.jdk.incubator.vector`. This benchmark serves as an example of how vectorization can be useful also in the area of text processing. It takes advantage of the fact that ASCII and Latin-1 were designed to optimize case-twiddling operations.
>
> The code came about during the work on #12632, where vectorization was deemed out of scope.
>
> Benchmark results:
>
>
> Benchmark (size) Mode Cnt Score Error Units
> EqualsIgnoreCaseBenchmark.scalar 16 avgt 15 21.575 ± 0.365 ns/op
> EqualsIgnoreCaseBenchmark.scalar 32 avgt 15 43.199 ± 2.786 ns/op
> EqualsIgnoreCaseBenchmark.scalar 64 avgt 15 71.389 ± 0.891 ns/op
> EqualsIgnoreCaseBenchmark.scalar 128 avgt 15 146.827 ± 1.115 ns/op
> EqualsIgnoreCaseBenchmark.scalar 1024 avgt 15 1062.759 ± 9.331 ns/op
> EqualsIgnoreCaseBenchmark.vectorized 16 avgt 15 21.483 ± 0.121 ns/op
> EqualsIgnoreCaseBenchmark.vectorized 32 avgt 15 10.538 ± 0.125 ns/op
> EqualsIgnoreCaseBenchmark.vectorized 64 avgt 15 13.182 ± 0.177 ns/op
> EqualsIgnoreCaseBenchmark.vectorized 128 avgt 15 19.192 ± 0.421 ns/op
> EqualsIgnoreCaseBenchmark.vectorized 1024 avgt 15 92.521 ± 3.494 ns/op
This pull request has now been integrated.
Changeset: 9fc518ff
Author: Eirik Bjorsnos <eirbjo at gmail.com>
Committer: Sandhya Viswanathan <sviswanathan at openjdk.org>
URL: https://git.openjdk.org/jdk/commit/9fc518ff8cadbbb731a016d8f53ed065b3561a7c
Stats: 157 lines in 1 file changed: 157 ins; 0 del; 0 mod
8303401: Add a Vector API equalsIgnoreCase micro benchmark
Reviewed-by: ecaspole, sviswanathan, psandoz
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PR: https://git.openjdk.org/jdk/pull/12790
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