Source file src/pkg/internal/bytealg/index_arm64.go

     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	
     5	package bytealg
     6	
     7	// Empirical data shows that using Index can get better
     8	// performance when len(s) <= 16.
     9	const MaxBruteForce = 16
    10	
    11	func init() {
    12		// Optimize cases where the length of the substring is less than 32 bytes
    13		MaxLen = 32
    14	}
    15	
    16	// Cutover reports the number of failures of IndexByte we should tolerate
    17	// before switching over to Index.
    18	// n is the number of bytes processed so far.
    19	// See the bytes.Index implementation for details.
    20	func Cutover(n int) int {
    21		// 1 error per 16 characters, plus a few slop to start.
    22		return 4 + n>>4
    23	}
    24	

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