On Fri, 18 Oct 2024 15:18:12 GMT, Doug Lea <d...@openjdk.org> wrote: >> This addresses tendencies in previous update to increase fencing, scanning, >> and signalling that can increase contention, and slow down performance >> especially on ARM platforms. It also uses more ARM-friendly constructions to >> reduce overhead (leading to several changes that all of the same form), > > Doug Lea has updated the pull request incrementally with one additional > commit since the last revision: > > Better disinguish need for exhaustive scans
src/java.base/share/classes/java/util/concurrent/ForkJoinPool.java line 2006: > 2004: if ((!propagated || > 2005: ((j & 1) == 0) && t instanceof > 2006: ForkJoinTask.InterruptibleTask) && It's probably premature, but given that all subclasses of InterruptibleTask are final, and that InterruptibleTask is abstract, it _might_ be cheaper to check `t.getClass().getSuperClass() == ForkJoinTask.InterruptibleTask.class`? 🤔 ------------- PR Review Comment: https://git.openjdk.org/jdk/pull/21507#discussion_r1806709142
