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Alberto Donizetti 72f099c36b cmd/compile: preallocate in, out arrays in methodfunc 
This gives a modest (but measurable) reduction in the number of
allocations when building the compilebench packages. It's safe and
exact (there's no heuristic or guessing, the lenghts of in and out are
known when we enter the function), so it may be worth it.

name       old time/op       new time/op       delta
Template         236ms ±23%        227ms ± 8%    ~     (p=0.955 n=8+7)
Unicode          112ms ± 7%        111ms ± 8%    ~     (p=0.798 n=8+8)
GoTypes          859ms ± 6%        874ms ± 6%    ~     (p=0.442 n=8+8)
Compiler         3.90s ±12%        3.85s ± 9%    ~     (p=0.878 n=8+8)
SSA              12.1s ± 7%        11.9s ± 8%    ~     (p=0.798 n=8+8)
Flate            151ms ±13%        157ms ±14%    ~     (p=0.382 n=8+8)
GoParser         190ms ±14%        192ms ±10%    ~     (p=0.645 n=8+8)
Reflect          554ms ± 5%        555ms ± 9%    ~     (p=0.878 n=8+8)
Tar              220ms ±19%        212ms ± 6%    ~     (p=0.867 n=8+7)
XML              296ms ±16%        303ms ±13%    ~     (p=0.574 n=8+8)

name       old alloc/op      new alloc/op      delta
Template        35.4MB ± 0%       35.4MB ± 0%  -0.03%  (p=0.021 n=8+8)
Unicode         29.2MB ± 0%       29.2MB ± 0%    ~     (p=0.645 n=8+8)
GoTypes          123MB ± 0%        123MB ± 0%  -0.02%  (p=0.001 n=7+8)
Compiler         514MB ± 0%        514MB ± 0%    ~     (p=0.336 n=8+7)
SSA             1.94GB ± 0%       1.94GB ± 0%  -0.00%  (p=0.004 n=8+7)
Flate           24.5MB ± 0%       24.5MB ± 0%  -0.03%  (p=0.015 n=8+8)
GoParser        28.7MB ± 0%       28.7MB ± 0%    ~     (p=0.279 n=8+8)
Reflect         87.4MB ± 0%       87.4MB ± 0%  -0.02%  (p=0.000 n=8+8)
Tar             35.2MB ± 0%       35.2MB ± 0%  -0.02%  (p=0.007 n=8+8)
XML             47.4MB ± 0%       47.4MB ± 0%    ~     (p=0.083 n=8+8)

name       old allocs/op     new allocs/op     delta
Template          348k ± 0%         348k ± 0%  -0.15%  (p=0.000 n=8+8)
Unicode           339k ± 0%         339k ± 0%    ~     (p=0.195 n=8+8)
GoTypes          1.28M ± 0%        1.27M ± 0%  -0.20%  (p=0.000 n=8+8)
Compiler         4.88M ± 0%        4.88M ± 0%  -0.15%  (p=0.000 n=8+8)
SSA              15.2M ± 0%        15.2M ± 0%  -0.02%  (p=0.000 n=8+7)
Flate             234k ± 0%         233k ± 0%  -0.34%  (p=0.000 n=8+8)
GoParser          291k ± 0%         291k ± 0%  -0.13%  (p=0.000 n=8+8)
Reflect          1.05M ± 0%        1.05M ± 0%  -0.20%  (p=0.000 n=8+8)
Tar               344k ± 0%         343k ± 0%  -0.22%  (p=0.000 n=8+8)
XML               430k ± 0%         429k ± 0%  -0.24%  (p=0.000 n=8+8)

Change-Id: I0044b99079ef211003325a7f136e35b55cc5cb74
Reviewed-on: https://go-review.googlesource.com/c/143638
Reviewed-by: Keith Randall <khr@golang.org>
 		2018-10-23 16:12:06 +00:00
.github .github: use HTTPS for Stack Overflow link in SUPPORT.md 2018-06-12 11:08:14 +00:00
api syscall: FreeBSD 12 ino64 support 2018-10-05 21:38:13 +00:00
doc doc: use the new log functions 2018-10-22 19:57:05 +00:00
lib/time lib/time: update vendored tzdata to release 2018e 2018-06-11 14:47:06 +00:00
misc internal/traceparser: provide parser that uses less space and parses segments of runtime trace files 2018-10-23 14:00:14 +00:00
src cmd/compile: preallocate in, out arrays in methodfunc 2018-10-23 16:12:06 +00:00
test cmd/compile: use proved bounds to remove signed division fix-ups 2018-10-23 02:29:44 +00:00
.gitattributes
…
.gitignore .gitignore: ignore src/cmd/dist/dist 2017-10-28 21:55:49 +00:00
AUTHORS A+C: add VMware as author, Venil Noronha as contributor 2018-08-31 02:14:24 +00:00
CONTRIBUTING.md all: restore changes from faulty merge/revert 2018-02-12 20:13:59 +00:00
CONTRIBUTORS A+C: add VMware as author, Venil Noronha as contributor 2018-08-31 02:14:24 +00:00
LICENSE
…
PATENTS
…
README.md README: linkify some paths 2018-06-06 18:07:01 +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

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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 thousands 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.