On Mon, 26 Jun 2023 09:57:31 GMT, 温绍锦 <d...@openjdk.org> wrote:
>> 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 > > 温绍锦 has updated the pull request incrementally with one additional commit > since the last revision: > > use ISO_8859_1.INSTANCE directly instead of StandardCharsets.ISO_8859_1 with JVMOpts '-XX:-CompactStrings', i tested on the MacBookPro M1 Max and found that the current version is faster than the baseline version. Benchmark Mode Cnt Score Error Units (PR current version 6b61a715) UUIDUtilsBenchmark.jdk thrpt 5 89601.097 ± 1879.659 ops/ms Benchmark Mode Cnt Score Error Units (baseline) UUIDUtilsBenchmark.jdk thrpt 5 71783.920 ± 170.914 ops/ms ------------- PR Comment: https://git.openjdk.org/jdk/pull/14578#issuecomment-1608475831
