f38f43d029
Many of Type's fields are etype-specific. This CL organizes them into their own auxiliary types, duplicating a few fields as necessary, and adds an Extra field to hold them. It also sorts the remaining fields for better struct packing. It also improves documentation for most fields. This reduces the size of Type at the cost of some extra allocations. There's no CPU impact; memory impact below. It also makes the natural structure of Type clearer. Passes toolstash -cmp on all architectures. Ideas for future work in this vein: (1) Width and Align probably only need to be stored for Struct and Array types. The refactoring to accomplish this would hopefully also eliminate TFUNCARGS and TCHANARGS entirely. (2) Maplineno is sparsely used and could probably better be stored in a separate map[*Type]int32, with mapqueue updated to store both a Node and a line number. (3) The Printed field may be removable once the old (non-binary) importer/exported has been removed. (4) StructType's fields field could be changed from *[]*Field to []*Field, which would remove a common allocation. (5) I believe that Type.Nod can be moved to ForwardType. Separate CL. name old alloc/op new alloc/op delta Template 57.9MB ± 0% 55.9MB ± 0% -3.43% (p=0.000 n=50+50) Unicode 38.3MB ± 0% 37.8MB ± 0% -1.39% (p=0.000 n=50+50) GoTypes 185MB ± 0% 180MB ± 0% -2.56% (p=0.000 n=50+50) Compiler 824MB ± 0% 806MB ± 0% -2.19% (p=0.000 n=50+50) name old allocs/op new allocs/op delta Template 486k ± 0% 497k ± 0% +2.25% (p=0.000 n=50+50) Unicode 377k ± 0% 379k ± 0% +0.55% (p=0.000 n=50+50) GoTypes 1.39M ± 0% 1.42M ± 0% +1.63% (p=0.000 n=50+50) Compiler 5.52M ± 0% 5.57M ± 0% +0.84% (p=0.000 n=47+50) Change-Id: I828488eeb74902b013d5ae4cf844de0b6c0dfc87 Reviewed-on: https://go-review.googlesource.com/21611 Reviewed-by: Matthew Dempsky <mdempsky@google.com> Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org> |
||
|---|---|---|
| .github | ||
| api | ||
| doc | ||
| lib/time | ||
| misc | ||
| src | ||
| test | ||
| .gitattributes | ||
| .gitignore | ||
| AUTHORS | ||
| CONTRIBUTING.md | ||
| CONTRIBUTORS | ||
| favicon.ico | ||
| LICENSE | ||
| PATENTS | ||
| README.md | ||
| robots.txt | ||
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.