![]() This CL make math.sqrt an intrinsic function, math.Sqrt is not affected since compiler can inline it. With this change, we can remove all assembly code for math.Sqrt that aims to speed up indirect call. The go compiler can generate same or faster code (with regabi) for indirect call. Benchmark on amd64: name old time/op new time/op delta SqrtIndirect 2.60ns ± 3% 1.03ns ± 4% -60.24% (p=0.000 n=10+10) SqrtLatency 3.40ns ± 1% 3.32ns ± 1% -2.26% (p=0.000 n=10+8) SqrtIndirectLatency 6.09ns ± 0% 3.31ns ± 0% -45.67% (p=0.000 n=10+10) SqrtGoLatency 36.1ns ± 6% 34.6ns ± 1% ~ (p=0.101 n=10+10) SqrtPrime 2.53µs ± 2% 2.55µs ± 6% ~ (p=0.398 n=9+9) Change-Id: If4be0f242c1d9d4feca7d269fc9cd6e6066f163d Reviewed-on: https://go-review.googlesource.com/c/go/+/421074 Run-TryBot: Wayne Zuo <wdvxdr@golangcn.org> Reviewed-by: Dmitri Shuralyov <dmitshur@google.com> Reviewed-by: Cherry Mui <cherryyz@google.com> Reviewed-by: Keith Randall <khr@golang.org> TryBot-Result: Gopher Robot <gobot@golang.org> |
||
---|---|---|
.github | ||
api | ||
doc | ||
lib/time | ||
misc | ||
src | ||
test | ||
.gitattributes | ||
.gitignore | ||
codereview.cfg | ||
CONTRIBUTING.md | ||
LICENSE | ||
PATENTS | ||
README.md | ||
SECURITY.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 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://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.