reflect, runtime: optimize Value.Call on s390x and add benchmark
Use an MVC loop to copy arguments in runtime.call* rather than copying bytes individually. I've added the benchmark CallArgCopy to test the speed of Value.Call for various argument sizes. name old speed new speed delta CallArgCopy/size=128 439MB/s ± 1% 582MB/s ± 1% +32.41% (p=0.000 n=10+10) CallArgCopy/size=256 695MB/s ± 1% 1172MB/s ± 1% +68.67% (p=0.000 n=10+10) CallArgCopy/size=1024 573MB/s ± 8% 4175MB/s ± 2% +628.11% (p=0.000 n=10+10) CallArgCopy/size=4096 1.46GB/s ± 2% 10.19GB/s ± 1% +600.52% (p=0.000 n=10+10) CallArgCopy/size=65536 1.51GB/s ± 0% 12.30GB/s ± 1% +716.30% (p=0.000 n=9+10) Change-Id: I87dae4809330e7964f6cb4a9e40e5b3254dd519d Reviewed-on: https://go-review.googlesource.com/28096 Run-TryBot: Michael Munday <munday@ca.ibm.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:Bill O'Farrell <billotosyr@gmail.com> Reviewed-by:
Brad Fitzpatrick <bradfitz@golang.org>
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