func BenchmarkPopcount(b *testing.B) {
var x uint64
x = 0
for i := 0; i < b.N; i++ {
_ = popcount.PopCount(x)
}
}
func main() {
fmt.Println(popcount.PopCount(4))
fmt.Println(popcountLoop.PopCount(4))
fmt.Println(popcountClearLsb.PopCount(4))
fmt.Println(popcountShift64.PopCount(4))
br := testing.Benchmark(BenchmarkPopcount)
fmt.Println(br)
br = testing.Benchmark(BenchmarkPopcountLoop)
fmt.Println(br)
br = testing.Benchmark(BenchmarkPopcountShift64)
fmt.Println(br)
br = testing.Benchmark(BenchmarkPopcountClearLsb)
fmt.Println(br)
}