XORBytes(nil, make([]byte, 1), make([]byte, 1))
	})
	mustPanic(t, "subtle.XORBytes: dst too short", func() {
		XORBytes(make([]byte, 1), make([]byte, 2), make([]byte, 3))
	})
}

func BenchmarkXORBytes(b *testing.B) {
	dst := make([]byte, 1<<15)
	data0 := make([]byte, 1<<15)
	data1 := make([]byte, 1<<15)
	sizes := []int64{1 << 3, 1 << 7, 1 << 11, 1 << 15}
	for _, size := range sizes {