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The Go programming language
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Alberto Donizetti 2ba98f1ae9 cmd/compile: avoid some allocations in regalloc 
Compilebench:
name      old time/op       new time/op       delta
Template        283ms ± 3%        281ms ± 4%    ~     (p=0.242 n=20+20)
Unicode         137ms ± 6%        135ms ± 6%    ~     (p=0.194 n=20+19)
GoTypes         890ms ± 2%        883ms ± 1%  -0.74%  (p=0.001 n=19+19)
Compiler        4.21s ± 2%        4.20s ± 2%  -0.40%  (p=0.033 n=20+19)
SSA             9.86s ± 2%        9.68s ± 1%  -1.80%  (p=0.000 n=20+19)
Flate           185ms ± 5%        185ms ± 7%    ~     (p=0.429 n=20+20)
GoParser        222ms ± 3%        222ms ± 4%    ~     (p=0.588 n=19+20)
Reflect         572ms ± 2%        570ms ± 3%    ~     (p=0.113 n=19+20)
Tar             263ms ± 4%        259ms ± 2%  -1.41%  (p=0.013 n=20+20)
XML             321ms ± 2%        321ms ± 4%    ~     (p=0.835 n=20+19)

name      old user-time/op  new user-time/op  delta
Template        400ms ± 5%        405ms ± 5%    ~     (p=0.096 n=20+20)
Unicode         217ms ± 8%        213ms ± 8%    ~     (p=0.242 n=20+20)
GoTypes         1.23s ± 3%        1.22s ± 3%    ~     (p=0.923 n=19+20)
Compiler        5.76s ± 6%        5.81s ± 2%    ~     (p=0.687 n=20+19)
SSA             14.2s ± 4%        14.0s ± 4%    ~     (p=0.121 n=20+20)
Flate           248ms ± 7%        251ms ±10%    ~     (p=0.369 n=20+20)
GoParser        308ms ± 5%        305ms ± 6%    ~     (p=0.336 n=19+20)
Reflect         771ms ± 2%        766ms ± 2%    ~     (p=0.113 n=20+19)
Tar             370ms ± 5%        362ms ± 7%  -2.06%  (p=0.036 n=19+20)
XML             435ms ± 4%        432ms ± 5%    ~     (p=0.369 n=20+20)

name      old alloc/op      new alloc/op      delta
Template       39.5MB ± 0%       39.4MB ± 0%  -0.20%  (p=0.000 n=20+20)
Unicode        29.1MB ± 0%       29.1MB ± 0%    ~     (p=0.064 n=20+20)
GoTypes         117MB ± 0%        117MB ± 0%  -0.17%  (p=0.000 n=20+20)
Compiler        503MB ± 0%        502MB ± 0%  -0.15%  (p=0.000 n=19+19)
SSA            1.42GB ± 0%       1.42GB ± 0%  -0.16%  (p=0.000 n=20+20)
Flate          25.3MB ± 0%       25.3MB ± 0%  -0.19%  (p=0.000 n=20+20)
GoParser       31.4MB ± 0%       31.3MB ± 0%  -0.14%  (p=0.000 n=20+18)
Reflect        78.1MB ± 0%       77.9MB ± 0%  -0.34%  (p=0.000 n=20+19)
Tar            40.1MB ± 0%       40.0MB ± 0%  -0.17%  (p=0.000 n=20+20)
XML            45.3MB ± 0%       45.2MB ± 0%  -0.13%  (p=0.000 n=20+20)

name      old allocs/op     new allocs/op     delta
Template         393k ± 0%         392k ± 0%  -0.21%  (p=0.000 n=20+19)
Unicode          337k ± 0%         337k ± 0%  -0.02%  (p=0.000 n=20+20)
GoTypes         1.22M ± 0%        1.22M ± 0%  -0.21%  (p=0.000 n=20+20)
Compiler        4.77M ± 0%        4.76M ± 0%  -0.16%  (p=0.000 n=20+20)
SSA             11.8M ± 0%        11.8M ± 0%  -0.12%  (p=0.000 n=20+20)
Flate            242k ± 0%         241k ± 0%  -0.20%  (p=0.000 n=20+20)
GoParser         324k ± 0%         324k ± 0%  -0.14%  (p=0.000 n=20+20)
Reflect          985k ± 0%         981k ± 0%  -0.38%  (p=0.000 n=20+20)
Tar              403k ± 0%         402k ± 0%  -0.19%  (p=0.000 n=20+20)
XML              424k ± 0%         424k ± 0%  -0.16%  (p=0.000 n=19+20)

Change-Id: I131e382b64cd6db11a9263a477d45d80c180c499
Reviewed-on: https://go-review.googlesource.com/102421
Run-TryBot: Alberto Donizetti <alb.donizetti@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
 		2018-03-25 18:27:49 +00:00
.github github: update Pull Request template 2018-02-21 02:07:46 +00:00
api syscall: support Getwd on all BSDs 2018-02-13 15:41:19 +00:00
doc doc: first version of new contribute guide 2018-03-22 10:24:44 +00:00
lib/time all: use HTTPS for iana.org links 2018-02-13 18:36:48 +00:00
misc all: enable c-shared/c-archive support for freebsd/amd64 2018-03-21 21:56:20 +00:00
src cmd/compile: avoid some allocations in regalloc 2018-03-25 18:27:49 +00:00
test test/codegen: port tbz/tbnz arm64 tests 2018-03-24 09:35:53 +00:00
.gitattributes
…
.gitignore .gitignore: ignore src/cmd/dist/dist 2017-10-28 21:55:49 +00:00
AUTHORS A+C: update my name and spelling 2018-02-21 04:12:57 +00:00
CONTRIBUTING.md all: restore changes from faulty merge/revert 2018-02-12 20:13:59 +00:00
CONTRIBUTORS C: add Filippo Valsorda's @golang.org email 2018-03-12 22:29:04 +00:00
LICENSE
…
PATENTS
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README.md all: restore changes from faulty merge/revert 2018-02-12 20:13:59 +00:00
favicon.ico website: recreate 16px and 32px favicon 2016-08-25 15:43:32 +00:00
robots.txt
…

README.md

The Go Programming Language

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

Gopher image Gopher image by Renee French, licensed under Creative Commons 3.0 Attributions license.

Our canonical Git repository is located at https://go.googlesource.com/go. There is a mirror of the repository at https://github.com/golang/go.

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

Download and Install

Binary Distributions

Official binary distributions are available at https://golang.org/dl/.

After downloading a binary release, visit https://golang.org/doc/install or load doc/install.html in your web browser for installation instructions.

Install From Source

If a binary distribution is not available for your combination of operating system and architecture, visit https://golang.org/doc/install/source or load doc/install-source.html in your web browser for source installation instructions.

Contributing

Go is the work of hundreds of contributors. We appreciate your help!

To contribute, please read the contribution guidelines: https://golang.org/doc/contribute.html

Note that the Go project uses the issue tracker for bug reports and proposals only. See https://golang.org/wiki/Questions for a list of places to ask questions about the Go language.