Looking for Shenandoah v2 / ZGC benchmarks

[Clemens Eisserer]

Hi,

Out of curiosity I am looking for (non-micro) benchmarks comparing
Shenandoah 2 with ZGC.
>From what can tell looking at the author's slides, obviously both are
able to keep pause times extremely low and in a more or less
comparable range, overall throughput suffers a bit, but not as
drastically as one would expect.

However, as far as I can tell, those SpecJBB runs typically presented
in slides are in both cases performed on big machines with cores to
spare.
So from what I understand, throughput results reflect mostly the
barrier code in the application threads and the additional memory
bandwith pressure caused by concurrent compaction, however there are
additional cores which can absorb at least part of the additional
concurrent load introduced by concurrent compaction.
What those benchmarks do not seem to reflect however is the total
amount of instructions executed, or better, CPU cycles consumed, i.e.
cloud costs.

Does anybody know of benchmarks / comparisons of ZGC / Shenandoah that
offer more than just throughput / pause time measurements?

Thanks, Clemens