mirror of
https://github.com/golang/go
synced 2024-11-07 11:36:11 -07:00
b9a59d9f2e
Adds a new runtime function to count runes in a string. Modifies the compiler to detect the pattern len([]rune(string)) and replaces it with the new rune counting runtime function. RuneCount/lenruneslice/ASCII 27.8ns ± 2% 14.5ns ± 3% -47.70% (p=0.000 n=10+10) RuneCount/lenruneslice/Japanese 126ns ± 2% 60ns ± 2% -52.03% (p=0.000 n=10+10) RuneCount/lenruneslice/MixedLength 104ns ± 2% 50ns ± 1% -51.71% (p=0.000 n=10+9) Fixes #24923 Change-Id: Ie9c7e7391a4e2cca675c5cdcc1e5ce7d523948b9 Reviewed-on: https://go-review.googlesource.com/108985 Run-TryBot: Martin Möhrmann <moehrmann@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com>
16 lines
377 B
Go
16 lines
377 B
Go
// asmcheck
|
|
|
|
// Copyright 2018 The Go Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style
|
|
// license that can be found in the LICENSE file.
|
|
|
|
package codegen
|
|
|
|
// This file contains code generation tests related to the handling of
|
|
// string types.
|
|
|
|
func CountRunes(s string) int { // Issue #24923
|
|
// amd64:`.*countrunes`
|
|
return len([]rune(s))
|
|
}
|