> On Apr 24, 2015, at 2:17 PM, John Rose <john.r.r...@oracle.com> wrote: > > On Apr 24, 2015, at 5:38 AM, Charles Oliver Nutter <head...@headius.com> > wrote: >> >> Hey folks! >> >> I'm wondering how the performance of ClassValue looks on recent >> OpenJDK 7 and 8 builds. JRuby 9000 will be Java 7+ only, so this is >> one place I'd like to simplify our code a bit. >> >> I could measure myself, but I'm guessing some of you have already done >> a lot of exploration or have benchmarks handy. So, what say you? > > I'm listening too. We don't have any special optimizations for CVs, > and I'm hoping the generic code is a good-enough start.
A while ago (wow; it’s more than a year already) I was working on: [#JDK-8031043] ClassValue's backing map should have a smaller initial size - Java Bug System <https://bugs.openjdk.java.net/browse/JDK-8031043> and we had a conversation about it: http://mail.openjdk.java.net/pipermail/mlvm-dev/2014-January/005597.html <http://mail.openjdk.java.net/pipermail/mlvm-dev/2014-January/005597.html> It’s not about performance directly but it’s about memory usage and maybe the one-value-per-class optimization John suggests is in fact a performance improvement. Someone should pick this one up. > — John > _______________________________________________ > mlvm-dev mailing list > mlvm-dev@openjdk.java.net > http://mail.openjdk.java.net/mailman/listinfo/mlvm-dev
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