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The Go programming language
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Martin Möhrmann f36e92dbfc fmt: avoid allocation when formatting byte slice arguments with verb s 
fmtBytes is in the top 10 callers of runtime.slicebytetostring according
to Google wide profiling data.

Avoid the string conversion of the input byte slice in fmtBytes by calling
a newly added specialized fmtS function for byte slices.

Expand tests for verb s with widths to test strings and byte slice arguments.

SprintfTruncateString     157ns ± 4%     156ns ± 3%     ~     (p=0.122 n=20+20)
SprintfTruncateBytes      188ns ± 2%     155ns ± 3%  -18.00%  (p=0.000 n=20+19)

name                   old alloc/op   new alloc/op   delta
SprintfTruncateString     16.0B ± 0%     16.0B ± 0%     ~     (all equal)
SprintfTruncateBytes      64.0B ± 0%     16.0B ± 0%  -75.00%  (p=0.000 n=20+20)

name                   old allocs/op  new allocs/op  delta
SprintfTruncateString      1.00 ± 0%      1.00 ± 0%     ~     (all equal)
SprintfTruncateBytes       2.00 ± 0%      1.00 ± 0%  -50.00%  (p=0.000 n=20+20)

Change-Id: I461bf514d4232b39bd9c812f7faa4e5ef693a03b
Reviewed-on: https://go-review.googlesource.com/c/145284
Run-TryBot: Martin Möhrmann <martisch@uos.de>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rob Pike <r@golang.org>
 		2018-11-14 20:32:15 +00:00
.github .github: don't render author-facing text in ISSUE_TEMPLATE 2018-11-02 04:47:34 +00:00
api syscall: FreeBSD 12 ino64 support 2018-10-05 21:38:13 +00:00
doc spec: be clearer about definition of string length 2018-11-13 00:42:32 +00:00
lib/time lib/time: update vendored tzdata to release 2018e 2018-06-11 14:47:06 +00:00
misc all: add support for synchronous callbacks to js/wasm 2018-11-10 11:57:17 +00:00
src fmt: avoid allocation when formatting byte slice arguments with verb s 2018-11-14 20:32:15 +00:00
test runtime: make processor capability variable naming platform specific 2018-11-14 20:30:31 +00:00
.gitattributes
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.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 doc: revert copyright date to 2009 2016-06-01 22:40:04 +00:00
PATENTS
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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
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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.

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 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.