Task #4659
open
Look into using newer and better hash function
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Description
Currently we use Murmurhash3, but newer and faster hashes are available:
CityHash (NFD uses it), FarmHash, xxHash (http://cyan4973.github.io/xxHash/)
Updated by Ashlesh Gawande almost 6 years ago
- Related to Bug #4818: murmurHash3 of uint32_t is not endian safe added
Updated by Junxiao Shi over 5 years ago
My current favorite is SipHash.
This benchmark says xxHash is faster than SipHash on short inputs, although I don't know the collision situation.
Updated by Davide Pesavento about 5 years ago
Currently we use Murmurhash3, but newer and faster hashes are available
More importantly, I'm not sure if Murmur3 guarantees that the computed hash is the same on all architectures (e.g. big/little endian), so using it in a network protocol is a major issue. Other modern hash functions such as xxHash guarantee portability.
CityHash (NFD uses it), FarmHash, xxHash
If you're going to change hash function, I don't think there's a good reason to use CityHash or FarmHash today. xxHash is probably fine, and also take a look at SipHash and HighwayHash.
Updated by Junxiao Shi almost 3 years ago
Updated by Davide Pesavento almost 3 years ago
- Status changed from New to Code review
- Assignee set to Junxiao Shi
- Target version set to v0.4.0
- Start date deleted (
07/09/2018)
Updated by Ashlesh Gawande almost 3 years ago
So the current patch-set removes Murmurhash3. Is there any utility in keeping the code there for reproducing old results and for comparison purposes?
Updated by Junxiao Shi almost 3 years ago
If you need to reproduce old results, check out old version of code.
Fewer/single choice => fewer moving pieces, less code to maintain, less confusion to developers.