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Martin Möhrmann e5864cd939 sort: optimize symMerge performance for blocks with one element
Use direct binary insertion instead of recursive calls to symMerge
when one of the blocks has only one element.

benchmark                   old ns/op      new ns/op      delta
BenchmarkStableString1K     421999         397629         -5.77%
BenchmarkStableInt1K        123422         120592         -2.29%
BenchmarkStableInt64K       9629094        9620200        -0.09%
BenchmarkStable1e2          123089         120209         -2.34%
BenchmarkStable1e4          39505228       36870029       -6.67%
BenchmarkStable1e6          8196612367     7630840157     -6.90%

Change-Id: I49905a909e8595cfa05920ccf9aa00a8f3036110
Reviewed-on: https://go-review.googlesource.com/2219
Reviewed-by: Robert Griesemer <gri@golang.org>
2015-01-06 23:30:46 +00:00
api api: update next.txt 2014-12-18 03:21:48 +00:00
doc doc: Added link to 'go help gopath' 2015-01-05 21:24:39 +00:00
include Revert "liblink, cmd/ld, runtime: remove stackguard1" 2015-01-05 16:29:56 +00:00
lib/time remove the obsolete lib/codereview. 2014-12-08 07:51:54 +00:00
misc misc/cgo: disable TestAllocateFromC in wbshadow mode 2015-01-06 22:22:59 +00:00
src sort: optimize symMerge performance for blocks with one element 2015-01-06 23:30:46 +00:00
test runtime: fix slicecopy return value for zero-width elements 2015-01-04 01:59:59 +00:00
.gitattributes .gitattributes: prevent all magic line ending changes 2014-12-12 23:14:54 +00:00
.gitignore all: tighten overly-broad runtime/z* gitignore line 2014-12-10 00:45:47 +00:00
AUTHORS A+C: add another email address for Emil Hessman 2014-11-12 10:01:23 -08:00
CONTRIBUTING.md doc: update README.md and CONTRIBUTING.md in response to review comments 2014-12-10 22:48:34 +00:00
CONTRIBUTORS C: add Nick Cooper (Google CLA). 2014-11-14 17:03:17 +11:00
LICENSE
PATENTS
README.md doc: update README.md and CONTRIBUTING.md in response to review comments 2014-12-10 22:48:34 +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

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.