fnv-c 0.1.7

Python 3.7+ FNV (fnv0, fnv1, fnv1a) non-cryptographic hash library implemented in C through libffi

fnv-c

What is it?

fnv-c is a Python 3.7+ FNV (fnv0, fnv1, fnv1a) non-cryptographic hash library implemented in C through libffi.

FNV ("Fowler–Noll–Vo") is is a non-cryptographic hash function created by Glenn Fowler, Landon Curt Noll, and Kiem-Phong. FNV is probably no the "best" non-cryptographic hash function but:

• it has a reasonably good distribution
• it's very fast
• it's very easy to implement (even in some exotic stored procedures for example) so you can use it everywhere

More details on this Wikepedia article.

Features

• speed: 4 000% faster than basic Python implementation, 40% faster than pyhash
• portability:
  • tested with recent Python versions (3.7+)
  • compatible with ARM64 and avoid too agressive CPU optimizations for maximizing binary portability
  • compatible with PyPy

Non features

• other hash algorithms (this library is only about FNV algorithm)

How to install/use it?

pip install fnv-c

import fnv_c

print(fnv_c.fnv0_32(b"foo bar"))
print(fnv_c.fnv0_64(b"foo bar"))
print(fnv_c.fnv1_32(b"foo bar"))
print(fnv_c.fnv1_64(b"foo bar"))
print(fnv_c.fnv1a_32(b"foo bar"))
print(fnv_c.fnv1a_64(b"foo bar"))

Function signatures / API

Full API doc is available at: https://botify-labs.github.io/fnv-c/fnv_c/

Dev

See this specific document