| commit | 6cadfe2fee9b063651f163aaa4734979944e7a9f | [log] [tgz] |
|---|---|---|
| author | Ignacio Hagopian <jsign.uy@gmail.com> | Tue Mar 30 17:18:06 2021 +0000 |
| committer | Daniel Martí <mvdan@mvdan.cc> | Tue Mar 30 17:41:58 2021 +0000 |
| tree | b1b3a3510d948cc3ebd5cf786b35575a475ed999 | |
| parent | 43afb1a22016ec537915ed8ade0039ad8c6559ce [diff] |
reflect: cache IsVariadic calls in Call These calls are cacheable, so do that to avoid doing extra work. This opportunity was discovered while taking a look at a CPU profile while investigating #7818. I added a BenchmarkCallMethod, which is similar to BechmarkCall but for a method receiver. Benchmark results, including the new BenchmarkCallMethod: name old time/op new time/op delta Call-16 22.0ns ±19% 20.2ns ±17% -8.08% (p=0.000 n=40+40) CallMethod-16 100ns ± 3% 91ns ± 2% -9.13% (p=0.000 n=40+39) CallArgCopy/size=128-16 15.7ns ± 1% 14.3ns ± 4% -8.98% (p=0.000 n=38+37) CallArgCopy/size=256-16 15.9ns ± 3% 15.0ns ± 5% -6.12% (p=0.000 n=39+39) CallArgCopy/size=1024-16 18.8ns ± 6% 17.1ns ± 6% -9.03% (p=0.000 n=38+38) CallArgCopy/size=4096-16 26.6ns ± 3% 25.2ns ± 4% -5.19% (p=0.000 n=39+40) CallArgCopy/size=65536-16 379ns ± 3% 371ns ± 5% -2.11% (p=0.000 n=39+40) name old alloc/op new alloc/op delta Call-16 0.00B 0.00B ~ (all equal) CallMethod-16 0.00B 0.00B ~ (all equal) name old allocs/op new allocs/op delta Call-16 0.00 0.00 ~ (all equal) CallMethod-16 0.00 0.00 ~ (all equal) name old speed new speed delta CallArgCopy/size=128-16 8.13GB/s ± 1% 8.92GB/s ± 4% +9.77% (p=0.000 n=38+38) CallArgCopy/size=256-16 16.1GB/s ± 3% 17.1GB/s ± 5% +6.56% (p=0.000 n=39+39) CallArgCopy/size=1024-16 54.6GB/s ± 6% 60.1GB/s ± 5% +9.93% (p=0.000 n=38+38) CallArgCopy/size=4096-16 154GB/s ± 5% 163GB/s ± 4% +5.63% (p=0.000 n=40+40) CallArgCopy/size=65536-16 173GB/s ± 3% 177GB/s ± 5% +2.18% (p=0.000 n=39+40) Updates #7818. Change-Id: I94f88811ea9faf3dc2543984a13b360b5db66a4b GitHub-Last-Rev: 9bbaa1854aa32cade905eddb05737e6224c372a1 GitHub-Pull-Request: golang/go#43475 Reviewed-on: https://go-review.googlesource.com/c/go/+/281252 Reviewed-by: Daniel Martí <mvdan@mvdan.cc> Reviewed-by: Keith Randall <khr@golang.org> Trust: Daniel Martí <mvdan@mvdan.cc> Trust: Brad Fitzpatrick <bradfitz@golang.org> Run-TryBot: Daniel Martí <mvdan@mvdan.cc> TryBot-Result: Go Bot <gobot@golang.org>
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