}
			b.SetBytes(int64(n))
			f(b, n)
		})
	}
}

var indexSizes = []int{10, 32, 4 << 10, 4 << 20, 64 << 20}

var isRaceBuilder = strings.HasSuffix(testenv.Builder(), "-race")

func BenchmarkIndexByte(b *testing.B) {
	benchBytes(b, indexSizes, bmIndexByte(IndexByte))
}

// indexBytePortable use as the baseline for performance comparisons.
func indexBytePortable(s []byte, c byte) int {
	for i, b := range s {