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408238e20b
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Russ Cox 408238e20b runtime: change default stack segment size to 8 kB 
Changing from 4 kB to 8 kB brings significant improvement
on a variety of the Go 1 benchmarks, on both amd64
and 386 systems.

Significant runtime reductions:

          amd64  386
GoParse    -14%  -1%
GobDecode  -12% -20%
GobEncode  -64%  -1%
JSONDecode  -9%  -4%
JSONEncode -15%  -5%
Template   -17% -14%

In the longer term, khr's new stacks will avoid needing to
make this decision at all, but for Go 1.2 this is a reasonable
stopgap that makes performance significantly better.

Demand paging should mean that if the second 4 kB is not
used, it will not be brought into memory, so the change
should not adversely affect resident set size.
The same argument could justify bumping as high as 64 kB
on 64-bit machines, but there are diminishing returns
after 8 kB, and using 8 kB limits the possible unintended
memory overheads we are not aware of.

Benchmark graphs at
http://swtch.com/~rsc/gostackamd64.html
http://swtch.com/~rsc/gostack386.html

Full data at
http://swtch.com/~rsc/gostack.zip

R=golang-dev, khr, dave, bradfitz, dvyukov
CC=golang-dev
https://golang.org/cl/14317043
2013-10-03 09:19:10 -04:00
api api: update next.txt 2013-09-23 13:56:21 -07:00
doc doc/faq: add a FAQ about versioning 2013-10-03 09:18:47 -04:00
include build: remove various uses of C undefined behavior 2013-09-09 15:07:23 -04:00
lib codereview: update use of promptchoice for Mercurial 2.7 2013-09-06 15:48:21 -04:00
misc misc/vim: Autocompletion for :Godoc command 2013-10-03 13:32:07 +10:00
src runtime: change default stack segment size to 8 kB 2013-10-03 09:19:10 -04:00
test cmd/gc: qualified embedded fields with owner package. 2013-10-02 12:27:33 -04:00
.hgignore build: ignore new zfiles, delete temp goplay binary in run.bash 2013-08-02 19:14:13 -07:00
.hgtags untag go1.2rc1 2013-09-19 22:34:33 +10:00
AUTHORS A+C: Nathan John Youngman (individual CLA) 2013-09-23 09:35:52 +10:00
CONTRIBUTORS C: add Dave Day (Google CLA). 2013-10-01 11:24:24 +10:00
favicon.ico godoc: update favicon 2012-10-11 17:02:36 +11:00
LICENSE doc: update licensing text one more time 2012-03-27 15:09:13 +11:00
PATENTS
README
robots.txt

README 

This is the source code repository for the Go programming language.  

For documentation about how to install and use Go,
visit http://golang.org/ or load doc/install.html in your web browser.

After installing Go, you can view a nicely formatted
doc/install.html by running godoc --http=:6060
and then visiting http://localhost:6060/doc/install.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 README).  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.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 doc/install.html for more details.