The changes to `Arrays.hashCode(Object[])` in JDK-8312164 caused its performance is reduced by about 80%.
This PR reverts this change. ------------- Commit messages: - Add benchmark - Revert changes to Arrays.hashCode(Object[]) in JDK-8312164 Changes: https://git.openjdk.org/jdk/pull/14944/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=14944&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8312424 Stats: 9 lines in 2 files changed: 8 ins; 0 del; 1 mod Patch: https://git.openjdk.org/jdk/pull/14944.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/14944/head:pull/14944 PR: https://git.openjdk.org/jdk/pull/14944
