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go/misc
Ilya Tocar 91102bf723 runtime: use bytes.IndexByte in findnull
bytes.IndexByte is heavily optimized. Use it in findnull.
This is second attempt, similar to CL97523.
In this version we never call IndexByte on region of memory,
that crosses page boundary. A bit slower than CL97523,
but still fast:

name        old time/op  new time/op  delta
GoString-6   164ns ± 2%   118ns ± 0%  -28.00%  (p=0.000 n=10+6)

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

Fixes #23830

Change-Id: Id843dd4f65a34309d92bdd8df229e484d26b0cb2
Reviewed-on: https://go-review.googlesource.com/98015
Run-TryBot: Ilya Tocar <ilya.tocar@intel.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2018-03-09 19:37:39 +00:00
..
android misc,src: add support for specifying adb flags to the android harness 2018-01-20 21:13:30 +00:00
arm all: make copyright headers consistent with one space after period 2016-05-02 13:43:18 +00:00
cgo runtime: use bytes.IndexByte in findnull 2018-03-09 19:37:39 +00:00
chrome/gophertool all: link to https instead of http 2015-07-11 14:36:33 +00:00
git misc/git: Fix non-literal period in pre-commit grep 2016-02-26 19:06:38 +00:00
ios misc/ios: dump logs for failing lldb sessions to stdout 2017-12-04 17:48:58 +00:00
linkcheck misc/linkcheck: better redirect handling, use meaningful exit code 2013-10-25 17:31:02 +03:00
nacl all: use HTTPS for iana.org links 2018-02-13 18:36:48 +00:00
sortac misc/sortac: add tool to sort the AUTHORS and CONTRIBUTORS files 2015-11-12 17:07:09 +00:00
swig cmd/go: fix swig support and run swig tests during run.bash 2017-11-16 17:19:19 +00:00
trace misc/trace: update trace-viewer 2017-08-25 15:50:29 +00:00
benchcmp all: use golang.org/x/... import paths 2014-11-10 09:15:57 +11:00
editors all: don't refer to code.google.com/p/go{,-wiki}/ 2015-02-06 14:41:47 +00:00