On Jun 8, 2011, at 11:10 PM, Attila Szegedi wrote: > Woo-hoo! I agree :-)
> > On Jun 8, 2011, at 9:48 PM, Charles Oliver Nutter wrote: > >> Hello friends! I have another update! >> >> I've just landed preliminary work to make JRuby directly bind Ruby to >> Java calls that were normally done via reflection! Currently only >> no-arg methods that return primitives, CharSequence/String, or void >> get patched straight through, but in those cases it makes a solid >> performance difference. >> >> Here's two benchmarks before direct binding and after: >> >> BEFORE (using invokedynamic, but bound to a DynamicMethod wrapper >> around java.lang.reflect.Method >> >> Measure System.currentTimeMillis, long becoming Fixnum >> 0.277000 0.000000 0.277000 ( 0.278000) >> 0.188000 0.000000 0.188000 ( 0.188000) >> 0.191000 0.000000 0.191000 ( 0.191000) >> 0.221000 0.000000 0.221000 ( 0.221000) >> 0.198000 0.000000 0.198000 ( 0.199000) >> Measure java.lang.Thread#name, String entering Ruby >> 0.520000 0.000000 0.520000 ( 0.520000) >> 0.380000 0.000000 0.380000 ( 0.380000) >> 0.383000 0.000000 0.383000 ( 0.383000) >> 0.378000 0.000000 0.378000 ( 0.378000) >> 0.388000 0.000000 0.388000 ( 0.389000) >> >> AFTER (using invokedynamic and MHs all the way to the target) >> >> Measure System.currentTimeMillis, int becoming Fixnum >> 0.173000 0.000000 0.173000 ( 0.172000) >> 0.126000 0.000000 0.126000 ( 0.126000) >> 0.137000 0.000000 0.137000 ( 0.137000) >> 0.148000 0.000000 0.148000 ( 0.148000) >> 0.147000 0.000000 0.147000 ( 0.147000) >> Measure java.lang.Thread#name, String entering Ruby >> 0.521000 0.000000 0.521000 ( 0.521000) >> 0.276000 0.000000 0.276000 ( 0.276000) >> 0.274000 0.000000 0.274000 ( 0.274000) >> 0.274000 0.000000 0.274000 ( 0.274000) >> 0.276000 0.000000 0.276000 ( 0.276000) >> >> In the latter case, this is only a tiny bit slower than a JRuby core >> class method that constructs a Ruby String, so the dispatch overhead >> of Ruby to Java has almost completely disappeared! Amazing! >> >> This can be disabled with jruby.invokedynamic.java=false, but since >> it's showing such a good perf improvement I've got it on by default >> right now. >> >> - Charlie >> _______________________________________________ >> mlvm-dev mailing list >> mlvm-dev@openjdk.java.net >> http://mail.openjdk.java.net/mailman/listinfo/mlvm-dev > > _______________________________________________ > mlvm-dev mailing list > mlvm-dev@openjdk.java.net > http://mail.openjdk.java.net/mailman/listinfo/mlvm-dev _______________________________________________ mlvm-dev mailing list mlvm-dev@openjdk.java.net http://mail.openjdk.java.net/mailman/listinfo/mlvm-dev
