Ristretto should investigate using the new go builtin hash functions

Moved from GitHub ristretto/163

Posted by nes1983:

The latest version of Go ships with a maphash package that’s meant for exactly ristretto’s kind of use case: maphash - The Go Programming Language. It’s probably worth investigating if it can be used in order to get a speed boost.

DisposaBoy commented :

FWIW: ristretto/z: use hash/memhash for hashing by rogpeppe · Pull Request #160 · dgraph-io/ristretto · GitHub