mph

mph is a Go package for that implements a minimal perfect hash table over strings. It uses the "Hash, displace, and compress" algorithm and the Murmur3 hash function.

Some quick benchmark results (this is on an i7-8700K):

• Build constructs a minimal perfect hash table from a 102k word dictionary in 18ms (construction time is linear in the size of the input).

• Lookups on that dictionary take about 30ns and are 27% faster than a map[string]uint32:

  BenchmarkTable-12               199293806               29.99 ns/op
  BenchmarkTableMap-12            145449822               40.92 ns/op