1// Copyright 2018 The Go Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style
3// license that can be found in the LICENSE file.
4
5package bytealg
6
7import "internal/cpu"
8
9const MaxBruteForce = 64
10
11func init() {
12	if cpu.X86.HasAVX2 {
13		MaxLen = 63
14	} else {
15		MaxLen = 31
16	}
17}
18
19// Cutover reports the number of failures of IndexByte we should tolerate
20// before switching over to Index.
21// n is the number of bytes processed so far.
22// See the bytes.Index implementation for details.
23func Cutover(n int) int {
24	// 1 error per 8 characters, plus a few slop to start.
25	return (n + 16) / 8
26}
27