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The Go programming language
4042b77776
struct Hmap is the header for a map value. CL 8377046 made flags a uint32 so that it could be updated atomically, but that bumped the struct to 56 bytes, which allocates as 64 bytes (on amd64). hash0 is initialized from runtime.fastrand1, which returns a uint32, so the top 32 bits were always zero anyway. Declare it as a uint32 to reclaim 4 bytes and bring the Hmap size back down to a 48-byte allocation. Fixes #5237. R=golang-dev, khr, khr CC=bradfitz, dvyukov, golang-dev https://golang.org/cl/12034047 |
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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.