| // 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. |
| |
| // +build ignore_for_gccgo |
| |
| package bytealg |
| |
| // Empirical data shows that using IndexShortStr 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 IndexShortStr. |
| // 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 |
| } |
