Yes, actually. Two things to change to (likely) boost your JVM+IntelliJ performance: 1. Use the new ZGC garbage collector. -XX:+UnlockExperimentalVMOptions -

Yes, actually. Two things to change to (likely) boost your JVM+IntelliJ performance: 1. Use the new ZGC garbage collector. -XX:+UnlockExperimentalVMOptions -XX:+UseZGC 2. If you're using ZGC, it is fucking imperative you do not use compressed pointers. It will totally hose your system and you'll see unbelievable RAM thrashing (800mb to 16gb and back again within a few hundred milliseconds in one smallish project I have [and thats on a 5950x]). That is to say, after enabling ZGC, ensure you do NOT have the following configuration line: -XX:+UseCompressedOops I've been using ZGC for a few days and I have to say it's been fucking great. Before I'd get really long hangs due to GC; or eventually the editor would grind to a halt (after like 8 hours of usage). I've had the editor open for at least 48 hours now and it's just as fast as it was when I originally opened it.