[sa1]

Non-preemptive concurrency doesn't invalidate any argument. Erlang's GC is per user thread, even a primitive GC per user thread will have lower latency than Java's GC.

[eggsnbacon1]

I want to see a source on this. Golang's GC is often touted as better than Java's but every real world benchmark I've seen shows that it sacrifices a lot of throughput for low pause times, essentially by running much more often.

Java's new garbage collectors, ZGC and Shenandoah, have average pause times of 0.3 milliseconds on heaps less than 4GB. I find it unlikely that another language has pause times shorter than that given the sheer amount of work put into Java GC over the years

[sa1]

> have average pause times of 0.3 milliseconds on heaps less than 4GB

The answer is that one user thread would have a lot less memory than 4GB, and the GC only needs to work on heap sizes of KBs to MBs for most cases.

There is no shared memory(well, mostly).

It's comparing apples and oranges.