Re: Performance of non-static method handles

- Mail original - > De: "Paul Sandoz" > À: "Da Vinci Machine Project" > Envoyé: Vendredi 2 Février 2018 17:52:44 > Objet: Re: Performance of non-static method handles > At some point in the future it may be possible, with the constant

Re: Performance of non-static method handles

At some point in the future it may be possible, with the constant folding work, to express the declaration of a MH locally but it gets stuffed in the constant pool (see amber constant-folding) if what the MH is derived from is constant. e.g. think of a language compiler intrinsic for ldc. That

Re: Performance of non-static method handles

s/instanceof/instead of :) Rémi - Mail original - > De: "Remi Forax" > À: "Da Vinci Machine Project" > Envoyé: Vendredi 2 Février 2018 14:03:35 > Objet: Re: Performance of non-static method handles > Hi Charles, > usually, it's because a

Re: Performance of non-static method handles

Hi Charles, usually, it's because a non constant method handle is not inlined into the callsite, so it's as fast as a function call or a method call when you ask to not inline. A way to improve the perf is to profile the method handles that can be seen when doing an invokeExact, and inline them

Re: Performance of non-static method handles

MH customization doesn't help here. The benchmark measures the cost of MH type check + MH.invokeBasic() call. For MH.invokeExact(), type check is ptr comparison of MH.type against MethodType associated with the call site. MH.invokeBasic() involves the following steps: MethodHandle

Re: Performance of non-static method handles

Vladimir Ivanov did some work a few years ago on MH customization for hot MH instances. It’s in the system. That should get better results than what you show. I wonder why it isn’t kicking in. You are using invokeExact right? > On Feb 2, 2018, at 1:26 PM, Charles Oliver Nutter

Performance of non-static method handles

Hey folks! I'm running some simple benchmarks for my FOSDEM handles talk and wanted to reopen discussion about the performance of non-static-final method handles. In my test, I just try to call a method that adds given argument to a static long. The numbers for reflection and static final handle