On Mon, 19 May 2025 23:53:07 GMT, Shaojin Wen <[email protected]> wrote:
>> Improve the performance of UUID::toString by using Long.expand and SWAR
>> (SIMD within a register) instead of table lookup. Eliminating the table
>> lookup can also avoid the performance degradation problem when the cache
>> misses.
>
> Shaojin Wen has updated the pull request incrementally with one additional
> commit since the last revision:
>
> hex8 comments
src/java.base/share/classes/java/util/UUID.java line 528:
> 526: * <pre>
> 527: * Input: 0x0123456789ABCDEF
> 528: * Output: 0x3031323334353637 ('0','1','2','3','4','5','6','7' in
> ASCII)
Only the low 32 bits are used, the example only needs to show the input ox
0x0123457.
Or change the signature to accept an `int`.
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PR Review Comment: https://git.openjdk.org/jdk/pull/22928#discussion_r2098745362
