ca384f7629
An extra "go build" was happening, for the sake of -tags=testgo, which would insert some extra behavior into ./internal/work. Instead, reuse the test binary as cmd/go directly, by calling the main func when a special env var is set. We still duplicate the test binary into testBin, because we need a "go" executable in that directory for $PATH. Finally, the special behavior is instead inserted via TestMain. The numbers below represent how long it takes to run zero tests, measured via: benchcmd GoTestNothing go test -run=- That is, the time it takes to run the first test is reduced by half. Note that these numbers are on a warm build cache, so if the -tags=testgo build were to be done from scratch, the speed-up would be significantly more noticeable. name old time/op new time/op delta GoTestNothing 830ms ± 2% 380ms ± 7% -54.23% (p=0.008 n=5+5) name old user-time/op new user-time/op delta GoTestNothing 1.64s ± 1% 0.82s ± 3% -50.24% (p=0.008 n=5+5) name old sys-time/op new sys-time/op delta GoTestNothing 306ms ± 7% 159ms ±28% -48.15% (p=0.008 n=5+5) name old peak-RSS-bytes new peak-RSS-bytes delta GoTestNothing 173MB ± 1% 147MB ± 1% -14.96% (p=0.008 n=5+5) Change-Id: I1f8fc71269a7b45bc5b82b7228e13f56589d44c3 Reviewed-on: https://go-review.googlesource.com/c/go/+/378294 Trust: Daniel Martí <mvdan@mvdan.cc> Run-TryBot: Daniel Martí <mvdan@mvdan.cc> TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Bryan Mills <bcmills@google.com> |
||
|---|---|---|
| .github | ||
| api | ||
| doc | ||
| lib/time | ||
| misc | ||
| src | ||
| test | ||
| .gitattributes | ||
| .gitignore | ||
| AUTHORS | ||
| codereview.cfg | ||
| CONTRIBUTING.md | ||
| CONTRIBUTORS | ||
| LICENSE | ||
| PATENTS | ||
| README.md | ||
| SECURITY.md | ||
The Go Programming Language
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.
Download and Install
Binary Distributions
Official binary distributions are available at https://golang.org/dl/.
After downloading a binary release, visit https://golang.org/doc/install for installation instructions.
Install From Source
If a binary distribution is not available for your combination of operating system and architecture, visit https://golang.org/doc/install/source for source installation instructions.
Contributing
Go is the work of thousands of contributors. We appreciate your help!
To contribute, please read the contribution guidelines at https://golang.org/doc/contribute.
Note that the Go project uses 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.