Test if omitting sha256 hash before adding to bloom filter is quicker.

The murmur3 used in bloom library is likely quicker.

[Source](https://www.reddit.com/r/programming/comments/6nbcak/d%C3%A9j%C3%A0_vu_fast_efficient_probabilistic/dk8cbhr/?context=3&st=j54g9ury&sh=a79a0db2)