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Jorropo fc814056aa cmd/compile: rewrite empty makeslice to zerobase pointer 
make\(\[\][a-zA-Z0-9]+, 0\) is seen 52 times in the go source.
And at least 391 times on internet:
https://grep.app/search?q=make%5C%28%5C%5B%5C%5D%5Ba-zA-Z0-9%5D%2B%2C%200%5C%29&regexp=true
This used to compile to calling runtime.makeslice.
However we can copy what we do for []T{}, just use a zerobase pointer.

On my machine this is 10x faster (from 3ns to 0.3ns).
Note that an empty loop also runs in 0.3ns,
so this really is free when you count superscallar execution.

Change-Id: I1cfe7e69f5a7a4dabbc71912ce6a4f8a2d4a7f3c
Reviewed-on: https://go-review.googlesource.com/c/go/+/454036
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Keith Randall <khr@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
Run-TryBot: Jakub Ciolek <jakub@ciolek.dev>
2023-01-20 04:57:35 +00:00
.github .github: suggest using private browsing in pkgsite template 2023-01-03 18:52:47 +00:00
api runtime: replace panic(nil) with panic(new(runtime.PanicNilError)) 2023-01-19 22:21:50 +00:00
doc runtime: replace panic(nil) with panic(new(runtime.PanicNilError)) 2023-01-19 22:21:50 +00:00
lib/time time/tzdata: generate zip constant during cmd/dist 2023-01-17 22:30:53 +00:00
misc all: fix typos in go file comments 2023-01-20 03:27:26 +00:00
src cmd/compile: rewrite empty makeslice to zerobase pointer 2023-01-20 04:57:35 +00:00
test cmd/compile: rewrite empty makeslice to zerobase pointer 2023-01-20 04:57:35 +00:00
.gitattributes all: treat all files as binary, but check in .bat with CRLF 2020-06-08 15:31:43 +00:00
.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
go.env cmd/go: introduce GOROOT/go.env and move proxy/sumdb config there 2023-01-17 23:10:39 +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 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.