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Posted to issues@trafficserver.apache.org by GitBox <gi...@apache.org> on 2022/03/23 02:54:01 UTC

[GitHub] [trafficserver] masaori335 opened a new issue #8756: Non-cryptographic hash for cache key

masaori335 opened a new issue #8756:
URL: https://github.com/apache/trafficserver/issues/8756


   We found that OpenSSL's md5 is expensive (*1). Replacing the library is an approach, but I start wondering we really need a cryptographic hash here.
   
   *1 https://github.com/apache/trafficserver/pull/8719
   
   #8755 is a PoC of using non-cryptographic has for URL hash. If we look at collision ratio and benchmarks, xxhash looks good for this use case.
   
   - https://github.com/Cyan4973/xxHash/wiki/Collision-ratio-comparison
   - https://github.com/Cyan4973/xxHash/wiki/Performance-comparison


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