Changes:
- Added xxhash3 hasher function.
- Added _with_hash functions for manually providing a hash to the
get, set, and delete functions. This makes the hash callback
that is given to the hashmap_new function optional.
- Added set_grow_by_power which defines how quickly the hashmap
grows when needed. Default is 1, which mean it doubles each
time it needs to grow, setting to 2 or 3 will grow by 4 or 8
respectively. Max 16.
- Default grow_at percentange has been changed from 0.75 to 0.60.
- The hash field now clipped with bitwise AND instead of shifting.
- The compare function is now optional. When not provided, the
clipped (48-bit) hash becomes the key.
- Code cleanup
tidwall