Stowage/go
2
0
Fork 0
mirror of https://github.com/golang/go.git synced 2025-12-08 06:10:04 +00:00
Code Issues Projects Releases Packages Wiki Activity

all: replace strings.Split with strings.SplitSeq

Browse source 
In Go 1.25+, strings.SplitSeq offers better
performance. Here are the benchmark results comparing
strings.Split and strings.SplitSeq in a for-loop, with the
benchmark code located in src/strings/iter_test.go:

goos: darwin
goarch: amd64
pkg: cmd/go/internal/auth
cpu: Intel(R) Core(TM) i7-8569U CPU @ 2.80GHz
                         │   old.txt   │               new.txt                │
                         │   sec/op    │    sec/op     vs base                │
ParseGitAuth/standard-8    281.4n ± 1%   218.0n ± 11%  -22.54% (p=0.000 n=10)
ParseGitAuth/with_url-8    549.1n ± 1%   480.5n ± 13%  -12.48% (p=0.002 n=10)
ParseGitAuth/minimal-8     235.4n ± 1%   197.3n ±  7%  -16.20% (p=0.000 n=10)
ParseGitAuth/complex-8     797.6n ± 2%   805.2n ±  4%        ~ (p=0.481 n=10)
ParseGitAuth/empty-8       87.48n ± 3%   63.25n ±  6%  -27.71% (p=0.000 n=10)
ParseGitAuth/malformed-8   228.8n ± 1%   171.2n ±  3%  -25.17% (p=0.000 n=10)
geomean                    288.9n        237.7n        -17.72%

                         │   old.txt   │              new.txt               │
                         │    B/op     │    B/op     vs base                │
ParseGitAuth/standard-8    192.00 ± 0%   96.00 ± 0%  -50.00% (p=0.000 n=10)
ParseGitAuth/with_url-8     400.0 ± 0%   288.0 ± 0%  -28.00% (p=0.000 n=10)
ParseGitAuth/minimal-8     144.00 ± 0%   80.00 ± 0%  -44.44% (p=0.000 n=10)
ParseGitAuth/complex-8      528.0 ± 0%   400.0 ± 0%  -24.24% (p=0.000 n=10)
ParseGitAuth/empty-8        32.00 ± 0%   16.00 ± 0%  -50.00% (p=0.000 n=10)
ParseGitAuth/malformed-8   176.00 ± 0%   80.00 ± 0%  -54.55% (p=0.000 n=10)
geomean                     179.0        102.1       -42.96%

                         │  old.txt   │              new.txt               │
                         │ allocs/op  │ allocs/op   vs base                │
ParseGitAuth/standard-8    3.000 ± 0%   2.000 ± 0%  -33.33% (p=0.000 n=10)
ParseGitAuth/with_url-8    4.000 ± 0%   3.000 ± 0%  -25.00% (p=0.000 n=10)
ParseGitAuth/minimal-8     3.000 ± 0%   2.000 ± 0%  -33.33% (p=0.000 n=10)
ParseGitAuth/complex-8     4.000 ± 0%   3.000 ± 0%  -25.00% (p=0.000 n=10)
ParseGitAuth/empty-8       2.000 ± 0%   1.000 ± 0%  -50.00% (p=0.000 n=10)
ParseGitAuth/malformed-8   3.000 ± 0%   2.000 ± 0%  -33.33% (p=0.000 n=10)
geomean                    3.086        2.040       -33.91%

Updates #69315.

Change-Id: Id0219edea45d9658d527b863162ebe917e7821d9
GitHub-Last-Rev: 392b315e12
GitHub-Pull-Request: golang/go#75259
Reviewed-on: https://go-review.googlesource.com/c/go/+/701015
Reviewed-by: Keith Randall <khr@golang.org>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
Reviewed-by: Emmanuel Odeke <emmanuel@orijtech.com>
Reviewed-by: Keith Randall <khr@google.com>
Auto-Submit: Emmanuel Odeke <emmanuel@orijtech.com>
This commit is contained in:
1911860538 2025-09-15 14:39:58 +00:00 • committed by Gopher Robot
parent 10bfddc91d
commit e3ed0fbe6a
39 changed files with 178 additions and 50 deletions
Download patch file Download diff file Expand all files Collapse all files

4
src/cmd/cgo/gcc.go
View file

@ -251,7 +251,7 @@ func (f *File) loadDefines(gccOptions []string) bool {
stdout := gccDefines(b.Bytes(), gccOptions)
var gccIsClang bool
for _, line := range strings.Split(stdout, "\n") {
for line := range strings.SplitSeq(stdout, "\n") {
if len(line) < 9 || line[0:7] != "#define" {
continue
}
@ -428,7 +428,7 @@ func (p *Package) guessKinds(f *File) []*Name {
notDeclared
)
sawUnmatchedErrors := false
for _, line := range strings.Split(stderr, "\n") {
for line := range strings.SplitSeq(stderr, "\n") {
// Ignore warnings and random comments, with one
// exception: newer GCC versions will sometimes emit
// an error on a macro #define with a note referring

2
src/cmd/cgo/internal/test/testx.go
View file

@ -447,7 +447,7 @@ func issue7978check(t *testing.T, wantFunc string, badFunc string, depth int) {
runtime.GC()
buf := make([]byte, 65536)
trace := string(buf[:runtime.Stack(buf, true)])
for _, goroutine := range strings.Split(trace, "\n\n") {
for goroutine := range strings.SplitSeq(trace, "\n\n") {
if strings.Contains(goroutine, "test.issue7978go") {
trace := strings.Split(goroutine, "\n")
// look for the expected function in the stack