0e7e43688d
hbits.morePointers and hbits.isPointer both do a load and a shift. Do it only once. Benchmarks using compilebench (because it is the benchmark I have the most tooling around), on a quiet machine. name old time/op new time/op delta Template 291ms ±14% 290ms ±15% ~ (p=0.702 n=100+99) Unicode 143ms ± 9% 142ms ± 9% ~ (p=0.126 n=99+98) GoTypes 934ms ± 4% 933ms ± 4% ~ (p=0.937 n=100+100) Compiler 4.92s ± 2% 4.90s ± 1% -0.28% (p=0.003 n=98+98) name old user-ns/op new user-ns/op delta Template 360user-ms ± 5% 355user-ms ± 4% -1.37% (p=0.000 n=97+96) Unicode 178user-ms ± 6% 176user-ms ± 6% -1.24% (p=0.001 n=96+99) GoTypes 1.22user-s ± 5% 1.21user-s ± 5% -0.94% (p=0.000 n=100+100) Compiler 6.50user-s ± 2% 6.44user-s ± 3% -0.94% (p=0.000 n=96+98) On amd64, before: "".scanobject t=1 size=581 args=0x10 locals=0x78 After: "".scanobject t=1 size=540 args=0x10 locals=0x78 Change-Id: I420ac3704549d484a5d85e19fea82c85da389514 Reviewed-on: https://go-review.googlesource.com/22712 Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com> Reviewed-by: Austin Clements <austin@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> |
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The Go Programming Language
Go is an open source programming language that makes it easy to build simple, reliable, and efficient software.
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.
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
Note that we do not accept pull requests and that we use the issue tracker for bug reports and proposals only. Please ask questions on https://forum.golangbridge.org or https://groups.google.com/forum/#!forum/golang-nuts.
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.