Use xxHash or MurmurHash3 for hashing

[vermaysha]

Hi,

After reading this article about PHP Hash Benchmark, then I have a suggestion, how about adding xxHash or Murmur3 in addition to MD5 to perform hashes faster.

With the aim to speed up the execution time. Would this be workable?

[spiritix]

Thanks for the suggestion, makes sense. Will include this in the next release.