| commit | cdbc363cb2a04bcf25e6bfd1e0937859291570a3 | [log] [tgz] |
|---|---|---|
| author | Russ Cox <rsc@golang.org> | Fri Oct 06 15:48:51 2017 -0400 |
| committer | Russ Cox <rsc@golang.org> | Wed Oct 11 19:03:26 2017 +0000 |
| tree | 7b96fa20cbc9749430c739016ade8252ecf991fa | |
| parent | 85f93c889aafa253a784362051681ee76f1d3564 [diff] |
cmd/go: record both build ID and content ID in archives and binaries The content ID will be needed for content-based staleness determination. It is defined as the SHA256 hash of the file in which it appears, with occurrences of the build+content IDs changed to zeros during the hashing operation. Storing the content ID in the archives is a little tricky but it means that later builds need not rehash the archives each time they are referenced, so under the assumption that each package is imported at least once after being compiled, hashing at build time is a win. (Also the whole file is more likely to be in cache at build time, since we just wrote it.) In my unscientific tests, the time for "go build -a std cmd" rises from about 14.3s to 14.5s on my laptop, or under 2%. Change-Id: Ia3d4dc657d003e8295631f73363868bd92ebf96a Reviewed-on: https://go-review.googlesource.com/69054 Reviewed-by: David Crawshaw <crawshaw@golang.org>
Go is an open source programming language that makes it easy to build simple, reliable, and efficient software.
Gopher image by Renee French, licensed under Creative Commons 3.0 Attributions license.
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.
Unless otherwise noted, the Go source files are distributed under the BSD-style license found in the LICENSE file.
Official binary distributions are available at https://golang.org/dl/.
After downloading a binary release, visit https://golang.org/doc/install or load doc/install.html in your web browser for installation instructions.
If a binary distribution is not available for your combination of operating system and architecture, visit https://golang.org/doc/install/source or load doc/install-source.html in your web browser for source installation instructions.
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 the Go project does not use GitHub pull requests, and that we use the issue tracker for bug reports and proposals only. See https://golang.org/wiki/Questions for a list of places to ask questions about the Go language.