RFR: 8234863: Increase default value of MaxInlineLevel
claes.redestad at oracle.com
Sun Dec 8 21:44:53 UTC 2019
increasing MaxInlineLevel can substantially improve performance in some
benchmarks, and has been reported to help applications implemented in
scala in particular.
There is always some risk of regressions when tweaking the default
inlining settings. I've done a number of experiments to ascertain that
the effect of increasing this on a wide array of benchmarks. With 15 all
benchmarks tested are show either neutral or positive results, with no
observed regression w.r.t. compilation speed or code cache usage.
 One http://renaissance.dev sub-benchmark improve by almost 3x with
an increase from 9 to 15.
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