Speed up `ConstantPoolBuilder::classEntry(ClassDesc)` by going through `ClassDesc` comparison and reusing descriptor hash to calculate internal name hash if possible. No suitable device to run benchmarks so need to find something to run the new benchmark to ensure things work as intended.
------------- Commit messages: - Fix microbenchmark - Improve jmh - 8338546: Speed up ConstantPoolBuilder::classEntry(ClassDesc) Changes: https://git.openjdk.org/jdk/pull/20667/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=20667&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8338546 Stats: 499 lines in 7 files changed: 498 ins; 0 del; 1 mod Patch: https://git.openjdk.org/jdk/pull/20667.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/20667/head:pull/20667 PR: https://git.openjdk.org/jdk/pull/20667
