On Fri, 27 May 2022 14:18:19 GMT, Claes Redestad <redes...@openjdk.org> wrote:
> In preparation of #8855 this PR refactors the conversions from `List` to > array and array to `List`, reducing the number of conversions when calling > `MethodHandles.dropArguments` in particular. This remove about ~5% of > allocations on the `StringConcatFactoryBootstraps` microbenchmark. Another datapoint is the `MethodHandlesDropArguments.interCreate` microbenchmark which explicitly tests `MethodHandles.dropArguments` (with a minimal argument list): Before: Benchmark Mode Cnt Score Error Units MethodHandlesDropArguments.interCreate avgt 5 136.778 ? 1.265 ns/op MethodHandlesDropArguments.interCreate:?gc.alloc.rate.norm avgt 5 264.020 ? 0.021 B/op Patch: Benchmark Mode Cnt Score Error Units MethodHandlesDropArguments.interCreate avgt 5 120.536 ? 3.133 ns/op MethodHandlesDropArguments.interCreate:?gc.alloc.rate.norm avgt 5 220.818 ? 41.309 B/op ------------- PR: https://git.openjdk.java.net/jdk/pull/8923
