Review Request: Zero speedup
Vladimir.Kozlov at Sun.COM
Fri Feb 12 10:17:16 PST 2010
I created bug 6926048: Improve Zero performance
Changes are good so I will push them.
Gary Benson wrote:
> Hi all,
> Zero's normal and native method entries both call
> methodOopDesc::result_type when a method returns without an exception.
> I didn't realise, but this parses the method's signature, so is pretty
> slow. This webrev makes Zero figure out result types in a similar way
> to the x86 and sparc C++ interpreter implementations.
> Some quick and dirty SPECjvm98 numbers (not produced in compliance
> with the SPECjvm98 run rules and therefore not comparable with
> SPECjvm98 metrics):
> Old New Speedup
> compress 151.38 136.34 9.9%
> jess 38.81 28.64 26.2%
> db 73.22 59.11 19.3%
> javac 43.10 34.84 19.2%
> mpegaudio 108.47 100.61 7.2%
> mtrt 38.66 29.30 24.2%
> jack 27.68 22.40 19.1%
> I don't have a bug id for this.
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