On 25/04/2015 13:44, "Remi Forax" <fo...@univ-mlv.fr> wrote: >On 04/24/2015 11:17 PM, John Rose 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. >> ‹ John > >I don't think I have a code that use ClassValue in a fast path . >I have several codes that uses a ClassValue when a callsite becomes >megamorphic but in that case, I have found that the perf of >ClassValue.get() hard to separate from the fact that I also loose >inlining.
I did have CV code in my fast paths for dispatch that I could do useful class hierarchy analysis on, but couldn¹t get it to run quite fast enough to be worthwhile. Whether that was due to the CV part or other factors I didn¹t fully analyse as CHA was not applicable to as many callsites as I¹d hoped. Duncan. _______________________________________________ mlvm-dev mailing list firstname.lastname@example.org http://mail.openjdk.java.net/mailman/listinfo/mlvm-dev