func BenchmarkHash64(b *testing.B)    { benchmarkHash(b, 64) }
func BenchmarkHash1024(b *testing.B)  { benchmarkHash(b, 1024) }
func BenchmarkHash65536(b *testing.B) { benchmarkHash(b, 65536) }

func TestArrayHash(t *testing.T) {
	// Make sure that "" in arrays hash correctly. The hash
	// should at least scramble the input seed so that, e.g.,
	// {"","foo"} and {"foo",""} have different hashes.