func benchmarkCountHard(b *testing.B, sep []byte) {
	for i := 0; i < b.N; i++ {
		Count(benchInputHard, sep)
	}
}

func BenchmarkIndexHard1(b *testing.B) { benchmarkIndexHard(b, []byte("<>")) }
func BenchmarkIndexHard2(b *testing.B) { benchmarkIndexHard(b, []byte("</pre>")) }
func BenchmarkIndexHard3(b *testing.B) { benchmarkIndexHard(b, []byte("<b>hello world</b>")) }
func BenchmarkIndexHard4(b *testing.B) {