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Dmitry Vyukov 71be013842 cmd/gc: don't copy string in range []byte(str) 
Using benchmark from the issue:

benchmark                    old ns/op     new ns/op     delta
BenchmarkRangeStringCast     2162          1152          -46.72%

benchmark                    old allocs     new allocs     delta
BenchmarkRangeStringCast     1              0              -100.00%

Fixes #2204

Change-Id: I92c5edd2adca4a7b6fba00713a581bf49dc59afe
Reviewed-on: https://go-review.googlesource.com/3790
Reviewed-by: Keith Randall <khr@golang.org>
2015-02-04 04:37:21 +00:00
api runtime: add GODEBUG=gccheckmark=0/1 2015-01-12 16:36:50 +00:00
doc doc: add log.SetOutput to go1.5.txt 2015-01-30 16:03:37 +00:00
include include: restore use of signal.h on windows (fixes build) 2015-02-03 23:16:29 +00:00
lib/time remove the obsolete lib/codereview. 2014-12-08 07:51:54 +00:00
misc misc/makerelease: send file size when uploading 2015-01-20 04:09:23 +00:00
src cmd/gc: don't copy string in range []byte(str) 2015-02-04 04:37:21 +00:00
test cmd/gc: fix capturing by value for range statements 2015-02-03 15:48:48 +00:00
.gitattributes .gitattributes: prevent all magic line ending changes 2014-12-12 23:14:54 +00:00
.gitignore all: tighten overly-broad runtime/z* gitignore line 2014-12-10 00:45:47 +00:00
AUTHORS A+C: add another email address for Emil Hessman 2014-11-12 10:01:23 -08:00
CONTRIBUTING.md doc: direct people to the mailing list 2015-01-18 21:27:07 +00:00
CONTRIBUTORS C: add Nick Cooper (Google CLA). 2014-11-14 17:03:17 +11:00
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README.md README: emphasize that we don't accept pull requests 2015-01-08 18:50:47 +00:00
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README.md

The Go Programming Language

Go is an open source programming language that makes it easy to build simple, reliable, and efficient software.

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For documentation about how to install and use Go, visit https://golang.org/ or load doc/install-source.html in your web browser.

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Please report issues here: https://golang.org/issue/new

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Please note that we do not use pull requests.

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Binary Distribution Notes

If you have just untarred a binary Go distribution, you need to set the environment variable $GOROOT to the full path of the go directory (the one containing this file). You can omit the variable if you unpack it into /usr/local/go, or if you rebuild from sources by running all.bash (see doc/install-source.html). You should also add the Go binary directory $GOROOT/bin to your shell's path.

For example, if you extracted the tar file into $HOME/go, you might put the following in your .profile:

export GOROOT=$HOME/go
export PATH=$PATH:$GOROOT/bin

See https://golang.org/doc/install or doc/install.html for more details.