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5a2875abe7
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Alan Donovan 5a2875abe7 go/loader: reduce contention for findPackage mutex 
...by making the cache non-blocking and duplicate-suppressing.

(The bottleneck was introduced while adding vendoring support.)
This reduces the 95th percentile map shard time for type-checking 120K
packages to 8min from 20min.

Also: move the I/O-limiting counting semaphore and the NoGoError check
from FindPackage to findPackage so that all implementations benefit.

Change-Id: I43527122262cf80475dd3212d78c340e1c71e36c
Reviewed-on: https://go-review.googlesource.com/18580
Reviewed-by: Robert Griesemer <gri@golang.org>
2016-01-13 18:09:25 +00:00
benchmark/parse benchmark/parse: fix cosmetic defect in error str. 2015-02-02 17:07:43 +00:00
blog tools: add import comments. 2014-12-09 22:42:16 +00:00
cmd x/tools/present: add video element for slides 2016-01-13 03:34:37 +00:00
container/intsets container/intsets: use fast popcount with gccgo 2015-11-11 02:17:02 +00:00
cover cover: accept inaccurate block endings 2015-01-07 02:00:16 +00:00
go go/loader: reduce contention for findPackage mutex 2016-01-13 18:09:25 +00:00
godoc godoc: hide vendored packages from /pkg/ as we do with internal packages 2016-01-13 08:57:48 +00:00
imports imports: Remove ancient Go 1.1 compatibility indirections. 2015-12-14 00:47:31 +00:00
oracle tools: switch to standard go/types at tip 2016-01-06 22:15:26 +00:00
playground playground/socket: only buffer messages of one kind, add tests 2015-10-30 06:08:43 +00:00
present x/tools/present: add video element for slides 2016-01-13 03:34:37 +00:00
refactor refactor/rename: fix crash with "." as -from package 2016-01-08 19:32:44 +00:00
.gitattributes tools: copying .gitattributes to all subrepositories (fixes windows build) 2014-12-23 06:32:51 +00:00
.gitignore dashboard: rearrange tree, in prep for packagification 2015-01-15 02:58:11 +00:00
AUTHORS go.empty: prototype for new subrepository 2012-01-25 14:45:13 -05:00
codereview.cfg tools: add codereview.cfg 2015-03-18 17:04:00 +00:00
CONTRIBUTING.md doc: add CONTRIBUTING.md 2015-02-18 23:43:38 +00:00
CONTRIBUTORS go.empty: prototype for new subrepository 2012-01-25 14:45:13 -05:00
LICENSE LICENSE: add 2012-03-17 15:20:58 +11:00
PATENTS go.empty: add PATENTS file to the subrepo. 2012-04-16 11:24:04 +10:00
README go.tools/README: minor correction. 2013-10-29 13:20:58 -04:00

README 

This subrepository holds the source for various packages and tools that support
the Go programming language.

Some of the tools, godoc and vet for example, are included in binary Go distributions.
Others, including the Go oracle and the test coverage tool, can be fetched with "go get".

Packages include a type-checker for Go and an implementation of the
Static Single Assignment form (SSA) representation for Go programs.

To submit changes to this repository, see http://golang.org/doc/contribute.html.