func BenchmarkExt2Insert(b *testing.B) {
	j, n := 0, len(data)
	f := cuckoo3.NewCuckooFilter(uint(n), 0.01)
	for i := 0; i < b.N; i++ {
		f.Add(data[j])
		if j++; j == n {
			j = 0
		}
	}
}
func initExt2(wg *sync.WaitGroup) {
	j, n := 0, len(data)
	fullFilter3 = cuckoo3.NewCuckooFilter(uint(n), 0.01)
	for i := 0; i < n; i++ {
		fullFilter3.Add(data[j])
		if j++; j == n {
			j = 0
		}
	}
	wg.Done()
}