On Fri, 17 Apr 2026 13:49:24 GMT, Frederic Parain <[email protected]> wrote:
>> The addition of the NULLABLE_NON_ATOMIC_FLAT layout forced the addition of a >> null-marker in all value classes instances, causing a instance size increase >> for value classes which didn't supported any nullable layout before. This >> size increase caused some performance regressions which boxing classes >> Double and Long. This patch temporarily disables the support for the >> NULLABLE_NON_ATOMIC_FLAT layout in classes Long and Double. A longer term >> solution will be developed and is tracked by JDK-8382361. >> >> Tested on Mach5: tiers 1-4 >> Thanks to @dafedafe for measuring the performance with the fix. >> >> - [x] I confirm that I make this contribution in accordance with the >> [OpenJDK Interim AI Policy](https://openjdk.org/legal/ai). > > Frederic Parain has updated the pull request incrementally with one > additional commit since the last revision: > > Fix typo Thanks for the fix @fparain! LGTM. ------------- Marked as reviewed by dfenacci (Committer). PR Review: https://git.openjdk.org/valhalla/pull/2331#pullrequestreview-4129411959
