mirror of https://github.com/golang/go.git
c51152f438
When searching for an allocated bit, flushptrbuf would search backward in the bitmap word containing the bit of pointer being looked-up before searching the span. This extra check was not replicated in markonly which, instead, after not finding an allocated bit for a pointer would directly look in the span. Using statistics generated from godoc, before this change span lookups were, on average, more common than word lookups. It was common for markonly to consult spans for one third of its pointer lookups. With this change in place, what were previously span lookups are overwhelmingly become by the word lookups making the total number of span lookups a relatively small fraction of the whole. This change also introduces some statistics gathering about lookups guarded by the CollectStats enum. R=golang-dev, khr CC=golang-dev https://golang.org/cl/13311043 |
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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.