Like #12077, this uses JDK's internal utilities to speed up ASCII reading in Class files, where most identifiers, from conventions to attribute names, are ASCII. See the JBS issue for more in-depth explanations.
Before: (Master) Benchmark Mode Cnt Score Error Units ReadMetadata.jdkReadMemberNames thrpt 4 167.623 ± 8.522 ops/s After: (This patch, first revision) Benchmark Mode Cnt Score Error Units ReadMetadata.jdkReadMemberNames thrpt 4 175.908 ± 4.766 ops/s ------------- Commit messages: - Use JLA string utilities for utf8 entry reading Changes: https://git.openjdk.org/jdk/pull/15837/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=15837&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8316587 Stats: 47 lines in 2 files changed: 24 ins; 13 del; 10 mod Patch: https://git.openjdk.org/jdk/pull/15837.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/15837/head:pull/15837 PR: https://git.openjdk.org/jdk/pull/15837
