On May 7, 2013, at 8:04 AM, Jochen Theodorou <blackd...@gmx.org> wrote:
> Hi, > > I am currently investigating here some performance issues and I may have > found a culprint here - invokeExact. My case is one where method caching > fails and I will have to do an invokeExact from Java - meaning without > the invokedynamic bytecode and with a non constant method handle. I am > aware of that being a non optimized path in indy, but it does not really > look fast to me at all. Maybe compared to Reflection, but to a runtime > generated class for the method invocation, it seems to be very very > slow- at least on my "64-Bit Server VM (build 25.0-b14, mixed mode)" here. Do you have any numbers? The problem is that if the MH is not constant we can't do any inlining and it will be an out-of-line call (with a trampoline in between). Is your DMH a static or virtual? -- Chris > > Now.. is that commonly known? Did I see wrong? Is there a way to improve > the speed (it is a DirectMethodHandle I am invoking already)? > > bye Jochen > _______________________________________________ > 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
