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The Go programming language
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Rui Ueyama 14950d89e5 strings: add fast path to Replace 
genericReplacer.lookup is called for each byte of an input
string. In many (most?) cases, lookup will fail for the first
byte, and it will return immediately. Adding a fast path for
that case seems worth it.

Benchmark on my Xeon 3.5GHz Linux box:

benchmark                        old ns/op    new ns/op    delta
BenchmarkGenericNoMatch               2691          774  -71.24%
BenchmarkGenericMatch1                7920         8151   +2.92%
BenchmarkGenericMatch2               52336        39927  -23.71%
BenchmarkSingleMaxSkipping            1575         1575   +0.00%
BenchmarkSingleLongSuffixFail         1429         1429   +0.00%
BenchmarkSingleMatch                 56228        55444   -1.39%
BenchmarkByteByteNoMatch               568          568   +0.00%
BenchmarkByteByteMatch                 977          972   -0.51%
BenchmarkByteStringMatch              1669         1687   +1.08%
BenchmarkHTMLEscapeNew                 422          422   +0.00%
BenchmarkHTMLEscapeOld                 692          670   -3.18%
BenchmarkByteByteReplaces             8492         8474   -0.21%
BenchmarkByteByteMap                  2817         2808   -0.32%

LGTM=rsc
R=golang-codereviews, bradfitz, dave, rsc
CC=golang-codereviews
https://golang.org/cl/79200044
 		2014-06-17 22:08:46 -07:00
api api: add go1.3.txt 2014-06-02 11:45:00 +09:00
doc doc: link to new downloads page 2014-06-13 16:34:52 +10:00
include liblink: fix field tracking 2014-05-20 00:30:58 -04:00
lib lib/codereview: fix doc/go1.*.txt exception 2014-06-12 20:12:50 -04:00
misc misc/emacs: add new function godoc-at-point 2014-06-17 15:52:29 -04:00
src strings: add fast path to Replace 2014-06-17 22:08:46 -07:00
test test: speed up chan/select5 2014-06-17 09:07:18 -07:00
.hgignore lib9: enable on Plan 9 2014-02-13 20:06:41 +01:00
.hgtags tag go1.3rc2 2014-06-13 13:30:54 +10:00
AUTHORS A+C: Alan Shreve (individual CLA) 2014-06-13 21:09:23 -07:00
CONTRIBUTORS A+C: Alan Shreve (individual CLA) 2014-06-13 21:09:23 -07:00
LICENSE doc: update licensing text one more time 2012-03-27 15:09:13 +11:00
PATENTS LICENSE: separate, change PATENTS text 2010-12-06 16:31:59 -05:00
README README: Fix installation instructions 2013-11-20 13:47:37 -08:00
favicon.ico godoc: update favicon 2012-10-11 17:02:36 +11:00
robots.txt godoc: serve robots.txt raw 2011-02-19 05:46:20 +11:00

README 

This is the source code repository for the Go programming language.  

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

After installing Go, you can view a nicely formatted
doc/install-source.html by running godoc --http=:6060
and then visiting http://localhost:6060/doc/install/source.

Unless otherwise noted, the Go source files are distributed
under the BSD-style license found in the LICENSE file.

--

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 README).  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.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 doc/install.html for more details.