go index_arm64 源码
golang index_arm64 代码
文件路径:/src/internal/bytealg/index_arm64.go
// 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 bytealg
// Empirical data shows that using Index can get better
// performance when len(s) <= 16.
const MaxBruteForce = 16
func init() {
// Optimize cases where the length of the substring is less than 32 bytes
MaxLen = 32
}
// Cutover reports the number of failures of IndexByte we should tolerate
// before switching over to Index.
// n is the number of bytes processed so far.
// See the bytes.Index implementation for details.
func Cutover(n int) int {
// 1 error per 16 characters, plus a few slop to start.
return 4 + n>>4
}
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