+1
> On Aug 8, 2019, at 8:28 AM, Claes Redestad <claes.redes...@oracle.com> wrote: > > Hi, > > in j.l.StringLatin1 we can and do call CharacterDataLatin1 directly in > some places, which avoids a few indirections. Doing so has no effect on peak > performance, but simplifies the work the JIT needs to do and speeds > up a variety of operations during startup and warmup. > > http://cr.openjdk.java.net/~redestad/8229283/open.00/ > https://bugs.openjdk.java.net/browse/JDK-8229283 > > Pre-existing StringUpperLower microbenchmark sees 1.5-1.9x > improvements when run with -Xint or -XX:TieredStopAtLevel=1. Affected > operations are very common, so there are tiny but measurable gains > across a diverse set of startup tests. > > Thanks! > > /Claes
