Merge pull request #118 from splitio/improvement/new_hash_implementation

Improvement/new hash implementation

Author: mredolatti

setup.py

@@ -35,7 +35,7 @@
           'test': tests_require,
           'redis': ['redis>=2.10.5', 'jsonpickle>=0.9.3'],
           'uwsgi': ['uwsgi>=2.0.0', 'jsonpickle>=0.9.3'],
-          'cpphash': ['splitmmh3']
+          'cpphash': ['mmh3cffi']
       },
       setup_requires=['nose'],
       classifiers=[

splitio/hashfns/__init__.py

@@ -11,12 +11,10 @@
 
 try:
     # First attempt to import module with C++ core (faster)
-    import mmh3
-    from ctypes import c_uint
+    import mmh3cffi
 
     def _murmur_hash(key, seed):
-        ukey = key.encode('utf8')
-        return c_uint(mmh3.hash(ukey, seed)).value
+        return mmh3cffi.hash_str(key, seed)
 except:
     # Fallback to interpreted python hash algoritm (slower)
     from splitio.hashfns import murmur3py