cdbc363cb2
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> |
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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.
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