If you have a nice reproducible case of the garbage collection problem, please file a bug https://bugzilla.mozilla.org/enter_bug.cgi?product=Core&component=Java

If you have a nice reproducible case of the garbage collection problem, please file a bug https://bugzilla.mozilla.org/enter_bug.cgi?product=Core&component=JavaScript%3A+GC https://bugzilla.mozilla.org/enter_bug.cgi?product=Core&comp... and I'll take a look. I've seen some similar issues, but I don't have anything good to work against right now. (The first thing I'll do is grab a profile with https://profiler.firefox.com https://profiler.firefox.com and that'll immediately tell basically what's going on. You could grab one too, and that'll be useful even if there's not an easy way to give me a reproduction.) There's also a very recently landed change that might help, if the problem happens to be excessively long minor GCs (which is what I've seen with similar sites): https://bugzilla.mozilla.org/show_bug.cgi?id=1751162 https://bugzilla.mozilla.org/show_bug.cgi?id=1751162 Shuffling data to the GPU could be an interesting case too, but that's not handled by the JS engine itself so I'm not as familiar with how that works. It sounds like it might be worth a bug if there isn't one already (and feel free to file; we'll triage and determine if it's a duplicate.)