I've been fiddling about with performance a bit again recently, and have noticed a perf degradation since b72. I mentioned this to the Nashorn guys and Marcus discovered that InlineSmallCode=2000 helped them get back to b72 performance. I can confirm this on JRuby as well, but in any case it seems that something has regressed.
Here's some numbers with JRuby. Numbers are for b72, hotspot-comp, and hotspot-comp with InlineSmallCode=2000. You can see that current hotspot-comp builds do not perform as well as b72 unless that flag is passed. https://gist.github.com/headius/de7f99b52847c2436ee4 I have not yet started to explore the inlining or assembly output, but I wanted to confirm that others are seeing this degradation. My build of hotspot-comp is current. I do have some benchmarks that look fine without the additional flag (neural_net, for example), so I'm confused what's different in the degraded cases. - Charlie
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