> Although advertised as low latency their pause times are comparable to G1. SOTA low latency collection is now <1msec and still falling. Their benchmarks don't

> Although advertised as low latency their pause times are comparable to G1. SOTA low latency collection is now <1msec and still falling. Their benchmarks don't really show this because they appear to be overdriving both ZGC and Shenandoah, which then totally collapse (e.g. >800msec pauses) due to the lack of generational collection making it hard for them to keep up with high allocation rates. This is an acknowledged limitation which at least the ZGC developers are working on removing, probably Shenandoah devs too, but the authors only mention this in one sentence right at the end. This quite a lot. From my experience with ZGC once you push it too hard to cause it to allocation stall you are in for a bad time. But if you manage to keep the load under that (usually by giving it larger a heap or more gc threads) you should expect pause times under 0.1ms. Hopefully with the generational ZGC that is in the works this gets better and one could run with smaller heaps/less cpu overhead.