On Thu, 4 May 2023 23:29:17 GMT, Chen Liang <li...@openjdk.org> wrote:
> This patch migrates `MethodHandles::arrayConstructor`, added in Java 9 as a > hotfix to the incorrect constructor found on arrays via Lookup, to share the > array access caching features. The result is that calling > `MethodHandles.arrayConstructor` to create method handles is much faster. > > Oracle JDK 20: > > Benchmark Mode Cnt Score > Error Units > MethodHandlesArrayConstructor.createWithAnewarray avgt 15 2.739 ± > 0.058 ns/op > MethodHandlesArrayConstructor.createWithMethodHandle avgt 15 3.313 ± > 0.041 ns/op > MethodHandlesArrayConstructor.methodHandleCreation avgt 15 61.874 ± > 0.397 ns/op > > > This patch: > > Benchmark Mode Cnt Score > Error Units > MethodHandlesArrayConstructor.createWithAnewarray avgt 15 3.067 ± > 0.026 ns/op > MethodHandlesArrayConstructor.createWithMethodHandle avgt 15 3.699 ± > 0.042 ns/op > MethodHandlesArrayConstructor.methodHandleCreation avgt 15 1.447 ± > 0.004 ns/op keep-alive. ------------- PR Comment: https://git.openjdk.org/jdk/pull/13819#issuecomment-1572983914
