By optimizing the implementation of java.lang.Long#fastUUID, the performance of the java.util.UUID#toString method can be significantly improved.
The following are the test results of JMH: Benchmark Mode Cnt Score Error Units UUIDUtilsBenchmark.new thrpt 5 92676.550 ± 292.213 ops/ms UUIDUtilsBenchmark.original thrpt 5 37040.165 ± 1023.532 ops/ms ------------- Commit messages: - 8310502 : optimization for UUID#toString Changes: https://git.openjdk.org/jdk/pull/14578/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=14578&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8310502 Stats: 105 lines in 1 file changed: 88 ins; 5 del; 12 mod Patch: https://git.openjdk.org/jdk/pull/14578.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/14578/head:pull/14578 PR: https://git.openjdk.org/jdk/pull/14578
