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champly ca7c6ef33d runtime/chan.go: improve closed channel receive performance 
Use this benchmark ut:

```go
func BenchmarkReceiveDataFromClosedChan(b *testing.B) {
	count := b.N
	ch := make(chan struct{}, count)
	for i := 0; i < count; i++ {
		ch <- struct{}{}
	}

	b.ResetTimer()
	for range ch {
	}
}
```

Benchmark 10 times(`go test -bench=.`), and then use `benchstat` got the result:

```shell
name                         old time/op  new time/op  delta
ReceiveDataFromClosedChan-5  12.0ns ± 1%  11.4ns ± 0%  -5.54%  (p=0.000 n=10+8)
```

Fixes:  #52067

Change-Id: I8db398cc8c04a46cb66ffb6768ab72a87903812f
GitHub-Last-Rev: 1e0142416f
GitHub-Pull-Request: golang/go#52068
Reviewed-on: https://go-review.googlesource.com/c/go/+/396884
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Russ Cox <rsc@golang.org>
Reviewed-by: Keith Randall <khr@google.com>
Run-TryBot: Keith Randall <khr@google.com>
Auto-Submit: Keith Randall <khr@google.com>
2022-04-12 02:18:23 +00:00
.github .github: remove duplicate security link 2022-01-07 17:55:09 +00:00
api go/doc: use go/doc/comment 2022-04-11 16:31:52 +00:00
doc doc/go1.19: use the right package error.Is arguments 2022-04-07 20:39:32 +00:00
lib/time lib/time, time/tzdata: update to 2021e 2021-11-11 05:16:39 +00:00
misc all: gofmt main repo 2022-04-11 16:34:30 +00:00
src runtime/chan.go: improve closed channel receive performance 2022-04-12 02:18:23 +00:00
test cmd/compile: add a test case and some comments for deadlock on syntax error 2022-04-12 01:18:27 +00:00
.gitattributes all: treat all files as binary, but check in .bat with CRLF 2020-06-08 15:31:43 +00:00
.gitignore internal/buildcfg: move build configuration out of cmd/internal/objabi 2021-04-16 19:20:53 +00:00
AUTHORS A+C: add Wen Yang (individual CLA) 2022-04-11 22:24:03 +00:00
codereview.cfg codereview.cfg: add codereview.cfg for master branch 2021-02-19 18:44:53 +00:00
CONTRIBUTING.md all: restore changes from faulty merge/revert 2018-02-12 20:13:59 +00:00
CONTRIBUTORS A+C: add Wen Yang (individual CLA) 2022-04-11 22:24:03 +00:00
LICENSE
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README.md README.md: update links to go.dev 2022-03-20 16:05:03 +00:00
SECURITY.md SECURITY.md: update go versions 2019-09-26 15:34:57 +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.

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Unless otherwise noted, the Go source files are distributed under the BSD-style license found in the LICENSE file.

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