On Sun, 25 Jun 2023 20:38:28 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:
>
> remove JavaLangAccess#fastUUID
src/java.base/share/classes/java/util/UUID.java line 515:
> 513:
> 514: try {
> 515: return jla.newStringNoRepl(buf, StandardCharsets.ISO_8859_1);
in java.base it's better to use `ISO_8859_1.INSTANCE` directly instead of
`StandardCharsets.ISO_8859_1`.
See [JDK-8234147](https://bugs.openjdk.org/browse/JDK-8234147)
-------------
PR Review Comment: https://git.openjdk.org/jdk/pull/14578#discussion_r1241889942
