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Daniel Martí a1925076fe cmd/go: add benchmark that execs 'go env GOARCH'
'go env' is used for many quick operations, such as in go/packages to
query GOARCH and GOMOD. It often is a bottleneck; for example,
go/packages doesn't know whether or not to use Go modules until it has
queried GOMOD.

As such, this go command should be fast. Right now it's slower than it
should be. This commit adds a simple benchmark with os/exec, since we're
particularly interested in the cost of cmd/go's large init function.

Updates #29382.

Change-Id: Ifee6fb9997b9b89565fbfc2739a00c86117b1d37
Reviewed-on: https://go-review.googlesource.com/c/155961
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
2019-02-27 16:18:23 +00:00
.github .github: don't render author-facing text in ISSUE_TEMPLATE 2018-11-02 04:47:34 +00:00
api text/scanner: don't liberally consume (invalid) floats or underbars 2019-02-20 20:23:28 +00:00
doc doc: add 1.12 to the project history 2019-02-26 17:31:55 +00:00
lib/time time: read 64-bit data if available 2019-02-26 23:10:35 +00:00
misc misc/android: copy testdata directories to device before running 2019-02-26 18:01:15 +00:00
src cmd/go: add benchmark that execs 'go env GOARCH' 2019-02-27 16:18:23 +00:00
test cmd/compile: optimize math/bits Len32 intrinsic on arm64 2019-02-27 16:09:33 +00:00
.gitattributes
.gitignore .gitignore: ignore src/cmd/dist/dist 2017-10-28 21:55:49 +00:00
AUTHORS A+C: change email address for Elias Naur 2019-01-23 15:05:26 +00:00
CONTRIBUTING.md all: restore changes from faulty merge/revert 2018-02-12 20:13:59 +00:00
CONTRIBUTORS CONTRIBUTORS: second round of updates for Go 1.12 2019-01-30 18:01:19 +00:00
favicon.ico website: recreate 16px and 32px favicon 2016-08-25 15:43:32 +00:00
LICENSE doc: revert copyright date to 2009 2016-06-01 22:40:04 +00:00
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README.md README: linkify some paths 2018-06-06 18:07:01 +00:00
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