`ZipCoder::checkedHashCode` emulates `StringLatin1::hashCode` but operates on a `byte[]` subrange. It can profitably use the recently introduced `ArraysSupport::vectorizedHashCode` method to see a speed-up, which translates to a small but significant speed-up on `ZipFile` creation.
Before: Benchmark (size) Mode Cnt Score Error Units ZipFileOpen.openCloseZipFile 512 avgt 15 83007.325 ± 1446.716 ns/op ZipFileOpen.openCloseZipFile 1024 avgt 15 154550.631 ± 2166.673 ns/op After: Benchmark (size) Mode Cnt Score Error Units ZipFileOpen.openCloseZipFile 512 avgt 15 79512.902 ± 814.449 ns/op ZipFileOpen.openCloseZipFile 1024 avgt 15 147892.522 ± 2744.017 ns/op ------------- Commit messages: - Use ArraysSupport.vectorizedHashCode in j.u.zip.ZipCoder Changes: https://git.openjdk.org/jdk/pull/12077/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=12077&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8300493 Stats: 116 lines in 4 files changed: 99 ins; 8 del; 9 mod Patch: https://git.openjdk.org/jdk/pull/12077.diff Fetch: git fetch https://git.openjdk.org/jdk pull/12077/head:pull/12077 PR: https://git.openjdk.org/jdk/pull/12077
