Re: Alternate hashing algorithm for higher performance?

2019-03-17 Thread 'Eamonn Nugent' via memcached
s since fairness will affect the bucket depth and thus > latency. > > Sorry if that's a pain in the ass, but this thing is quite widely used and > there aren't really beta testers :) Have to be thorough these days. > > -Dormando > > On Sun, 17 Mar 2019, 'Eamonn Nug

Re: Alternate hashing algorithm for higher performance?

2019-03-17 Thread 'Eamonn Nugent' via memcached
Reporting back with very preliminary benchmarks. Somehow, xxh64 is actually faster than xxh3 on my machine. One thing I forgot to mention before - I also looked at latencies with xxh32/64, and saw the 99th percentile latency lowered by about half compared to mmh3. So it could be beneficial in that

Re: Alternate hashing algorithm for higher performance?

2019-03-17 Thread 'Eamonn Nugent' via memcached
Hiya, Last night, I was running memtier_benchmark on my laptop (mid-2015 15" MBP, 2.5GHz 4c i7) and achieved about a 10-15% throughput improvement on both modern and non-modern settings on the 64 bit variant. 32 bit variant was about equal in performance (the results showed them to be within about