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2027b00e63
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Klaus Post 2027b00e63 hash/crc32: add AMD64 optimized IEEE CRC calculation 
IEEE is the most commonly used CRC-32 polynomial, used by zip, gzip and others.

Based on http://www.intel.com/content/dam/www/public/us/en/documents/white-papers/fast-crc-computation-generic-polynomials-pclmulqdq-paper.pdf

benchmark                       old ns/op     new ns/op     delta
BenchmarkIEEECrc1KB-8           3193          352           -88.98%
BenchmarkIEEECrc4KB-8           5025          1307          -73.99%
BenchmarkCastagnoliCrc1KB-8     126           126           +0.00%

benchmark                       old MB/s     new MB/s     speedup
BenchmarkIEEECrc1KB-8           320.68       2901.92      9.05x
BenchmarkIEEECrc4KB-8           815.08       3131.80      3.84x
BenchmarkCastagnoliCrc1KB-8     8100.80      8109.78      1.00x

Change-Id: I99c9a48365f631827f516e44f97e86155f03cb90
Reviewed-on: https://go-review.googlesource.com/14080
Reviewed-by: Keith Randall <khr@golang.org>
2015-09-16 15:42:42 +00:00
api api: update go1.5.txt 2015-07-30 21:14:09 +00:00
doc doc: go1.6.txt: template.Funcs checks names 2015-09-15 16:12:59 +00:00
lib/time lib/time: update to IANA release 2015e. 2015-07-22 02:56:31 +00:00
misc runtime: unblock special glibc signals on each thread 2015-09-14 21:59:54 +00:00
src hash/crc32: add AMD64 optimized IEEE CRC calculation 2015-09-16 15:42:42 +00:00
test test: move allocation before munmap in recover4 2015-09-16 08:51:48 +00:00
.gitattributes
.gitignore .gitignore: ignore y.output 2015-06-10 00:28:52 +00:00
AUTHORS A+C: automated updates 2015-09-10 00:59:04 +00:00
CONTRIBUTING.md doc: suggest security@golang.org for reporting security issues 2015-06-26 09:53:36 +00:00
CONTRIBUTORS A+C: automated updates 2015-09-10 00:59:04 +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.

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.

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

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

Please note that we do not use pull requests.

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 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.