RFR: 8359424: Eliminate table lookup in Integer/Long toHexString
Shaojin Wen
swen at openjdk.org
Fri Jun 13 12:07:21 UTC 2025
In PR #22928, UUID introduced long-based vectorized hexadecimal to string conversion, which can also be used in Integer::toHexString and Long::toHexString to eliminate table lookups. The benefit of eliminating table lookups is that the performance is better when cache misses occur.
-------------
Commit messages:
- Merge remote-tracking branch 'upstream/master' into optim_to_hex_202501
- use right shift
- use right shift
- fix benchmark
- Merge remote-tracking branch 'upstream/master' into optim_to_hex_202501
- Merge remote-tracking branch 'upstream/master' into optim_to_hex_202501
- Merge remote-tracking branch 'upstream/master' into optim_to_hex_202501
- reverseBytes
- reverseBytes
- public hex8
- ... and 9 more: https://git.openjdk.org/jdk/compare/e18277b4...6f491ced
Changes: https://git.openjdk.org/jdk/pull/22942/files
Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=22942&range=00
Issue: https://bugs.openjdk.org/browse/JDK-8359424
Stats: 262 lines in 6 files changed: 178 ins; 77 del; 7 mod
Patch: https://git.openjdk.org/jdk/pull/22942.diff
Fetch: git fetch https://git.openjdk.org/jdk.git pull/22942/head:pull/22942
PR: https://git.openjdk.org/jdk/pull/22942
More information about the core-libs-dev
mailing list