errors: optimize Is and As by reusing reflection of target
goos: darwin
goarch: amd64
pkg: errors
cpu: Intel(R) Core(TM) i7-9750H CPU @ 2.60GHz
│ old │ new │
│ sec/op │ sec/op vs base │
Is-12 133.4n ± 0% 126.8n ± 3% -4.91% (p=0.001 n=10)
As-12 464.1n ± 1% 307.2n ± 0% -33.80% (p=0.000 n=10)
geomean 248.8n 197.4n -20.66%
│ old │ new │
│ B/op │ B/op vs base │
Is-12 24.00 ± 0% 24.00 ± 0% ~ (p=1.000 n=10) ¹
As-12 40.00 ± 0% 40.00 ± 0% ~ (p=1.000 n=10) ¹
geomean 30.98 30.98 +0.00%
¹ all samples are equal
│ old │ new │
│ allocs/op │ allocs/op vs base │
Is-12 1.000 ± 0% 1.000 ± 0% ~ (p=1.000 n=10) ¹
As-12 2.000 ± 0% 2.000 ± 0% ~ (p=1.000 n=10) ¹
geomean 1.414 1.414 +0.00%
¹ all samples are equal
Change-Id: I0844f3ab77e63b5f773594157dcffaffffd5e70d
Reviewed-on: https://go-review.googlesource.com/c/go/+/520756
Run-TryBot: Ian Lance Taylor <iant@google.com>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Ian Lance Taylor <iant@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com> Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>