On Mon, 22 Apr 2024 14:11:41 GMT, Claes Redestad <redes...@openjdk.org> wrote:
>> This switch expression in `Locale::createLocale` is causing a somewhat large >> startup regression on my local system. Desugaring to if statements seem like >> the right thing to do while we investigate ways to further reduce overheads >> in `SwitchBootstraps`. >> >> These numbers are against a baseline which include #18865 and #18845, which >> already improved the situation: >> >> >> Name Cnt Base Error Test >> Error Unit Change >> Perfstartup-Noop 20 40,500 ± 1,942 31,000 ± >> 2,673 ms/op 1,31x (p = 0,000*) >> :.cycles 143254849,000 ± 3398321,355 102205427,650 ± >> 2192784,853 cycles 0,71x (p = 0,000*) >> :.instructions 307138448,850 ± 2095834,550 219415574,800 ± >> 376992,067 instructions 0,71x (p = 0,000*) >> :.taskclock 39,500 ± 1,942 22,500 ± >> 3,858 ms 0,57x (p = 0,000*) >> * = significant >> >> >> Comparing to a baseline without those recent improvements the overhead was >> almost the double: >> >> Name Cnt Base Error Test >> Error Unit Change >> Perfstartup-Noop 20 50,000 ± 0,000 31,000 ± >> 2,673 ms/op 1,61x (p = 0,000*) >> :.cycles 187047932,000 ± 3330400,381 102205427,650 ± >> 2192784,853 cycles 0,55x (p = 0,000*) >> :.instructions 408219060,350 ± 4031173,140 219415574,800 ± >> 376992,067 instructions 0,54x (p = 0,000*) >> :.taskclock 53,500 ± 4,249 22,500 ± >> 3,858 ms 0,42x (p = 0,000*) >> * = significant > > Claes Redestad has updated the pull request incrementally with one additional > commit since the last revision: > > Remove InternalError in favor of CCE Thanks for the fix, Claes! ------------- Marked as reviewed by naoto (Reviewer). PR Review: https://git.openjdk.org/jdk/pull/18882#pullrequestreview-2015234211
