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Than McIntosh 2e2ef666b4 [dev.link] cmd/link/internal/loader: add PkgNone resolver cache 
Add a cache for the loader.Loader.resolve() method to use when
looking mapping local PkgNone symbols to global symbol indices.
This helps avoid repeated map lookups during deadcode and other
early phases of the linker when we haven't fully read in all
of object file symbols. Benchstat numbers:

name                      old time/op       new time/op       delta
LinkCompiler                    1.97s ±13%        1.67s ± 8%  -15.34%  (p=0.000 n=20+20)
LinkWithoutDebugCompiler        1.48s ±12%        1.21s ±11%  -18.14%  (p=0.000 n=20+20)

name                      old user-time/op  new user-time/op  delta
LinkCompiler                    2.19s ± 9%        2.04s ±17%   -6.98%  (p=0.002 n=19+20)
LinkWithoutDebugCompiler        1.29s ±13%        1.20s ±13%   -7.70%  (p=0.000 n=20+20)

Change-Id: I4b0b05c8208ee44ee9405b24774b84443e486831
Reviewed-on: https://go-review.googlesource.com/c/go/+/203197
Run-TryBot: Than McIntosh <thanm@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
 		2019-10-25 17:15:50 +00:00
.github .github: don't render author-facing text in ISSUE_TEMPLATE 2018-11-02 04:47:34 +00:00
api api/go1.13: add debug/elf.Symbol fields added in CL 184099 2019-08-08 18:44:16 +00:00
doc doc/go1.14: announce upcoming removal of darwin/386 port 2019-10-18 18:12:39 +00:00
lib/time lib/time: update tz data to 2019b 2019-07-03 23:08:27 +00:00
misc [dev.link] cmd/link: restore export data hash 2019-10-17 20:28:28 +00:00
src [dev.link] cmd/link/internal/loader: add PkgNone resolver cache 2019-10-25 17:15:50 +00:00
test [dev.link] all: merge branch 'master' into dev.link 2019-10-18 14:44:05 -04:00
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CONTRIBUTING.md all: restore changes from faulty merge/revert 2018-02-12 20:13:59 +00:00
CONTRIBUTORS C: update email address for utkarsh-extc 2019-10-03 12:39:06 +00:00
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README.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 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 or load doc/install.html in your web browser 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 or load doc/install-source.html in your web browser for source installation instructions.

Contributing

Go is the work of thousands of contributors. We appreciate your help!

To contribute, please read the contribution guidelines: https://golang.org/doc/contribute.html

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.