use FNV algorithm instead of JEN
It provides better performances for hashmap lookups.
@@ -582,7 +582,7 @@ do {
#ifdef HASH_FUNCTION
#define HASH_FCN HASH_FUNCTION
#else
-#define HASH_FCN HASH_JEN
+#define HASH_FCN HASH_FNV //HASH_JEN
#endif
/* The Bernstein hash function, used in Perl prior to v5.6. Note (x<<5+x)=x*33. */
