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Chris Marchesi a2ace8ec18 net/http: unfurl persistConnWriter's underlying writer 
Make persistConnWriter implement io.ReaderFrom, via an io.Copy on the
underlying net.Conn. This in turn enables it to use OS level
optimizations such as sendfile.

This has been observed giving performance gains even in the absence
of ReaderFrom, more than likely due to the difference in io's default
buffer (32 KB) versus bufio's (4 KB).

Speedups on linux/amd64:
benchmark                               old MB/s     new MB/s     speedup
BenchmarkFileAndServer_16MB/NoTLS-4     662.96       2703.74      4.08x
BenchmarkFileAndServer_16MB/TLS-4       552.76       1420.72      2.57x

Speedups on darwin/amd64:
benchmark                               old MB/s     new MB/s     speedup
BenchmarkFileAndServer_16MB/NoTLS-8     357.58       1972.86      5.52x
BenchmarkFileAndServer_16MB/TLS-8       346.20       1067.41      3.08x

Updates #30377.

Change-Id: Ic88d4ac254f665223536fcba4d551fc32ae105b6
GitHub-Last-Rev: a6f67cda2e
GitHub-Pull-Request: golang/go#30390
Reviewed-on: https://go-review.googlesource.com/c/go/+/163737
Run-TryBot: Emmanuel Odeke <emm.odeke@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Emmanuel Odeke <emm.odeke@gmail.com>
2019-03-07 07:48:16 +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 missing paragraph break in Effective Go 2019-03-07 04:46:03 +00:00
lib/time time: read 64-bit data if available 2019-02-26 23:10:35 +00:00
misc misc: fix typos in various docs 2019-03-07 07:30:06 +00:00
src net/http: unfurl persistConnWriter's underlying writer 2019-03-07 07:48:16 +00:00
test reflect: fix more issues with StructOf GC programs 2019-03-07 00:06:12 +00:00
.gitattributes .gitattributes: prevent all magic line ending changes 2014-12-12 23:14:54 +00:00
.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
PATENTS LICENSE: separate, change PATENTS text 2010-12-06 16:31:59 -05:00
README.md README: linkify some paths 2018-06-06 18:07:01 +00:00
robots.txt godoc: serve robots.txt raw 2011-02-19 05:46:20 +11:00

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 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.

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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

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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.