> This code makes an intrinsic stub for `Unsafe::setMemory`. See [this > PR](https://github.com/openjdk/jdk/pull/16760) for discussion around this > change. > > Overall, making this an intrinsic improves overall performance of > `Unsafe::setMemory` by up to 4x for all buffer sizes. > > Tested with tier-1 (and full CI). I've added a table of the before and after > numbers for the JMH I ran (`MemorySegmentZeroUnsafe`). > > [setMemoryBM.txt](https://github.com/openjdk/jdk/files/14808974/setMemoryBM.txt)
Scott Gibbons has updated the pull request incrementally with one additional commit since the last revision: Use non-sse fill (old left in) ------------- Changes: - all: https://git.openjdk.org/jdk/pull/18555/files - new: https://git.openjdk.org/jdk/pull/18555/files/401a2a96..c5cb30cc Webrevs: - full: https://webrevs.openjdk.org/?repo=jdk&pr=18555&range=01 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=18555&range=00-01 Stats: 795 lines in 2 files changed: 765 ins; 12 del; 18 mod Patch: https://git.openjdk.org/jdk/pull/18555.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/18555/head:pull/18555 PR: https://git.openjdk.org/jdk/pull/18555
