Earlier quoted context omitted.
Is there a reason these are not getting backported to OpenJDK? I know that jetbrains do contribute a bit, but I feel like their model of having way out of date jdks shipped (offering worse performance then available) is not a good one. (They just recently switched to 11, and was still using the old concurrentms GC, over which G1 runs circles, let alone ZGC)
It is absolutely awful by default; IntelliJ apps are slow to the point of being unusable out of the box. The good news is that it is easily fixed (at least for my use case). I have tinkered a bit and running them on JDK16 or later, with JATOC has been a life-saver for me the past year, and reduced my paying subscription to an act of charity. "Develop with pleasure" is well and truly dead until they make the out-of-bo…
I am currently using IntelliJ heavily at work and I would agree it was too slow for a gigantic project we have... but there's literally no alternatives that work nearly as great (Eclipse, Emacs, VSCode, tried them all, they mostly can't even load a project like ours --- Eclipse can but it's a pain to index everything on re-builds)... but since I got a Mac M1 Pro, IntelliJ again feels light and snappy :D unfortunately, having the best hardware possible seems necessary now, as ever.