> 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 ------------- Changes: - all: https://git.openjdk.org/valhalla/pull/2331/files - new: https://git.openjdk.org/valhalla/pull/2331/files/70d965da..39855a48 Webrevs: - full: https://webrevs.openjdk.org/?repo=valhalla&pr=2331&range=01 - incr: https://webrevs.openjdk.org/?repo=valhalla&pr=2331&range=00-01 Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod Patch: https://git.openjdk.org/valhalla/pull/2331.diff Fetch: git fetch https://git.openjdk.org/valhalla.git pull/2331/head:pull/2331 PR: https://git.openjdk.org/valhalla/pull/2331
