// DiffBits returns the number of bits that are different in two SHA256 hashes.
func DiffBits(c1, c2 [32]byte) int {
var count int
for i := range c1 {
count += popcount.PopCount(uint64(c1[i] ^ c2[i]))
}
return count
}
func BenchmarkPopCount(b *testing.B) {
for i := 0; i < b.N; i++ {
popcount.PopCount(0x1234567890ABCDEF)
}
}