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The Go programming language
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erifan01 f8ef6ed24a internal/bytealg: optimize Index (substring lengths from 9 to 32) on arm64 
The current code is not optimized for cases where the length of the
substring to be searched is between 9 bytes and 32 bytes. This CL
optimizes the situations.

Benchmark:
name                             old time/op  new time/op  delta
pkg:strings goos:linux goarch:arm64
IndexHard1-8                     1.06ms ± 0%  1.06ms ± 0%   -0.44%  (p=0.000 n=7+8)
IndexHard2-8                     1.25ms ± 1%  1.26ms ± 2%     ~     (p=0.328 n=8+8)
IndexHard3-8                     2.85ms ± 1%  1.18ms ± 1%  -58.59%  (p=0.000 n=8+8)
IndexHard4-8                     2.90ms ± 1%  2.87ms ± 1%   -0.96%  (p=0.021 n=8+8)

pkg:bytes goos:linux goarch:arm64
IndexByte/4M-8                      726124.200000ns +- 6%     560021.400000ns +-20%  -22.88%  (p=0.008 n=5+5)
IndexRune/4M-8                      928768.600000ns +- 0%     793144.600000ns +- 6%  -14.60%  (p=0.008 n=5+5)

Change-Id: Ieebeb784ae69b2a0642ea96e9486a1d120923568
Reviewed-on: https://go-review.googlesource.com/109895
Reviewed-by: Cherry Zhang <cherryyz@google.com>
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2018-05-01 15:45:54 +00:00
.github github: update Pull Request template 2018-02-21 02:07:46 +00:00
api syscall: introduce Pointer type and use it instead of uintptr 2018-04-18 08:50:42 +00:00
doc doc: document Go 1.10.2 2018-04-30 18:01:00 +00:00
lib/time all: use HTTPS for iana.org links 2018-02-13 18:36:48 +00:00
misc cmd/cgo: visit cgo type inside ellipsis node 2018-05-01 00:44:48 +00:00
src internal/bytealg: optimize Index (substring lengths from 9 to 32) on arm64 2018-05-01 15:45:54 +00:00
test cmd/compile: open code select{send,recv,default} 2018-05-01 03:17:44 +00:00
.gitattributes
.gitignore .gitignore: ignore src/cmd/dist/dist 2017-10-28 21:55:49 +00:00
AUTHORS A+C: update email address 2018-04-14 19:28:37 +00:00
CONTRIBUTING.md all: restore changes from faulty merge/revert 2018-02-12 20:13:59 +00:00
CONTRIBUTORS C: add Iskander Sharipov's individual CLA mail 2018-04-16 04:49:46 +00:00
favicon.ico website: recreate 16px and 32px favicon 2016-08-25 15:43:32 +00:00
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README.md README: update number of contributors 2018-04-03 22:10:32 +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.

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Contributing

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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.