RFR: 8303401: Add a Vector API equalsIgnoreCase micro benchmark [v3]
Sandhya Viswanathan
sviswanathan at openjdk.org
Tue Feb 28 23:16:04 UTC 2023
On Tue, 28 Feb 2023 23:08:29 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 20.671 ± 0.718 ns/op
>> EqualsIgnoreCaseBenchmark.scalar 32 avgt 15 46.155 ± 3.258 ns/op
>> EqualsIgnoreCaseBenchmark.scalar 64 avgt 15 68.248 ± 1.767 ns/op
>> EqualsIgnoreCaseBenchmark.scalar 128 avgt 15 148.948 ± 0.890 ns/op
>> EqualsIgnoreCaseBenchmark.scalar 1024 avgt 15 1090.708 ± 7.540 ns/op
>> EqualsIgnoreCaseBenchmark.vectorized 16 avgt 15 21.872 ± 0.232 ns/op
>> EqualsIgnoreCaseBenchmark.vectorized 32 avgt 15 11.378 ± 0.097 ns/op
>> EqualsIgnoreCaseBenchmark.vectorized 64 avgt 15 13.703 ± 0.135 ns/op
>> EqualsIgnoreCaseBenchmark.vectorized 128 avgt 15 21.632 ± 0.735 ns/op
>> EqualsIgnoreCaseBenchmark.vectorized 1024 avgt 15 105.509 ± 7.493 ns/op
>
> Eirik Bjorsnos has updated the pull request incrementally with two additional commits since the last revision:
>
> - Uppercase Thorn is 0xDE
> - Update 'a' to 'A' and 'z' to 'Z' in comments
Looks good to me.
-------------
Marked as reviewed by sviswanathan (Reviewer).
PR: https://git.openjdk.org/jdk/pull/12790
More information about the core-libs-dev
mailing list