[theobeers]

Perhaps the new "Green Tea" GC will help? It's described as "a parallel marking algorithm that, if not memory-centric, is at least memory-aware, in that it endeavors to process objects close to one another together."

https://github.com/golang/go/issues/73581

[openasocket]

I saw that! I’m definitely interested in trying it out to see if it helps for our use case. Of course, at this point we’ve reduced allocations so much the GC doesn’t have a ton of work to do, unless we slip up somewhere (which has happened). I’ll probably have to intentionally add some allocations in a hot path as a stress test.

What I would absolutely love is a compacting garbage collector, but my understanding is Go can’t add that without breaking backwards compatibility, and so likely will never do that.