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7365fac2db
go/misc/cgo
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Josh Bleecher Snyder 7365fac2db runtime: use bytes.IndexByte in findnull 
bytes.IndexByte is heavily optimized.
Use it in findnull.

name        old time/op  new time/op  delta
GoString-8  65.5ns ± 1%  40.2ns ± 1%  -38.62%  (p=0.000 n=19+19)

findnull is also used in gostringnocopy,
which is used in many hot spots in the runtime.

Fixes #23830

Change-Id: I2e6cb279c7d8078f8844065de684cc3567fe89d7
Reviewed-on: https://go-review.googlesource.com/97523
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2018-03-01 20:34:07 +00:00
..
errors cmd/go: accept only limited compiler and linker flags in #cgo directives 2018-02-07 15:35:57 +00:00
fortran *.bash: always use the same string equality operator 2017-03-14 21:46:31 +00:00
gmp all: make copyright headers consistent with one space after period 2016-05-02 13:43:18 +00:00
life test/run: use go tool compile + link instead of go run when possible 2017-10-31 13:21:05 +00:00
nocgo
stdio test/run: use go tool compile + link instead of go run when possible 2017-10-31 13:21:05 +00:00
test runtime: use bytes.IndexByte in findnull 2018-03-01 20:34:07 +00:00
testasan
testcarchive cmd/go: correct buildmode test (from "c-header" to "c-shared") 2018-01-11 19:24:35 +00:00
testcshared misc/cgo/testcshared: increase sleep in TestUnexportedSymbols 2018-02-14 15:03:29 +00:00
testgodefs cmd/cgo: add -srcdir option 2016-10-30 19:14:08 +00:00
testplugin misc/cgo/testplugin: unskip test 2017-12-06 18:57:07 +00:00
testsanitizers all: use Fatalf instead of Fatal if format is given 2018-01-10 01:35:45 +00:00
testshared cmd/go: make gccgo -buildmode=shared and -linkshared work again 2018-01-12 05:25:55 +00:00
testsigfwd misc/cgo/testsigfwd: add missing return statement 2016-08-30 21:44:14 +00:00
testso
testsovar misc/cgo/testsovar: needs the extern keyword to export variables on non-windows platforms 2015-07-21 18:10:57 +00:00
testtls all: make copyright headers consistent with one space after period 2016-05-02 13:43:18 +00:00