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09408a5b45
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Daniel Martí 09408a5b45 encoding/gob: avoid filling userTypeCache at init time 
Doing this work at init time does make the first encode or decode call
slightly faster, but the cost is still paid upfront.

However, not all programs which directly or indirectly import
encoding/gob end up encoding or decoding any values.
For example, a program might only be run with the -help flag,
or it might only use gob encoding when a specific mode is enabled.

Moreover, any work done at init time needs to happen sequentially and
before the main function can start, blocking the entire program.

Using benchinit, we see a moderate saving at init time:

	goos: linux
	goarch: amd64
	cpu: AMD Ryzen 7 PRO 5850U with Radeon Graphics
				│     old     │                new                 │
				│   sec/op    │   sec/op     vs base               │
	EncodingGob   188.9µ ± 0%   175.4µ ± 0%  -7.15% (p=0.000 n=10)

				│     old      │                 new                 │
				│     B/op     │     B/op      vs base               │
	EncodingGob   39.78Ki ± 0%   38.46Ki ± 0%  -3.32% (p=0.000 n=10)

				│    old     │                new                │
				│ allocs/op  │ allocs/op   vs base               │
	EncodingGob   668.0 ± 0%   652.0 ± 0%  -2.40% (p=0.000 n=10)

Change-Id: I75a5df18c9b1d02566e5885a966360d8a525913a
Reviewed-on: https://go-review.googlesource.com/c/go/+/479396
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Rob Pike <r@golang.org>
Reviewed-by: Ian Lance Taylor <iant@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
2023-03-29 22:56:11 +00:00
.github doc: normalize proposal-process links 2023-03-29 22:00:27 +00:00
api net: mptcp: implement listenMPTCP 2023-03-29 22:12:20 +00:00
doc runtime: for deep stacks, print both the top 50 and bottom 50 frames 2023-03-21 19:14:14 +00:00
lib/time time/tzdata: generate zip constant during cmd/dist 2023-01-17 22:30:53 +00:00
misc runtime/cgo: store M for C-created thread in pthread key 2023-03-24 16:00:24 +00:00
src encoding/gob: avoid filling userTypeCache at init time 2023-03-29 22:56:11 +00:00
test cmd/compile: casts from slices to array pointers are known to be non-nil 2023-03-29 21:55:11 +00:00
.gitattributes
.gitignore time/tzdata: generate zip constant during cmd/dist 2023-01-17 22:30:53 +00:00
codereview.cfg codereview.cfg: add codereview.cfg for master branch 2021-02-19 18:44:53 +00:00
CONTRIBUTING.md doc: normalize proposal-process links 2023-03-29 22:00:27 +00:00
go.env cmd/go: introduce GOROOT/go.env and move proxy/sumdb config there 2023-01-17 23:10:39 +00:00
LICENSE
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README.md README: update from CC-BY-3.0 to CC-BY-4.0 2022-11-02 20:14:56 +00:00
SECURITY.md SECURITY.md: replace golang.org with go.dev 2022-04-26 19:59:47 +00:00

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 4.0 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://go.dev/dl/.

After downloading a binary release, visit https://go.dev/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://go.dev/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://go.dev/doc/contribute.

Note that the Go project uses the issue tracker for bug reports and proposals only. See https://go.dev/wiki/Questions for a list of places to ask questions about the Go language.