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Seems like this has been merged:

https://github.com/golang/go/issues/35112

https://github.com/golang/proposal/blob/master/design/35112-...

As far as I know, without a generational or regional GC, golang will always have issues with large heaps.

Brad Fitzpatrick and others pointed out that in that article they were using Go 1.6, but the garbage collector got way better since then and it would be possible that just upgrading Go would have solved the issue for them.

I don't know the Discord case but Olric implements an append-only log file indexed with a built-in map(uint64 > uint64) to store data.

It was discussed here https://news.ycombinator.com/item?id=22238335

Ah, as I understood it the Discord issues only shows up when you do a large long term map(? -> object) but maps with primitive values don't trigger it.