[infinispan-dev] Hash functions

Jason T. Greene jason.greene at redhat.com
Wed Mar 31 00:07:06 EDT 2010


Jason T. Greene wrote:
> Manik Surtani wrote:
>> On 29 Mar 2010, at 10:30, Galder Zamarreno wrote:
>>
>>> Manik,
>>>
>>> If String's are dealt with by calling String.getBytes() which in 
>>> turns  gets processed as a byte[], why is there such a big 
>>> difference  SuperFastHash String speed and MurmurHash2 String speed 
>>> (162 ms vs 56 ms)  but there's hardly any difference between the 
>>> byte[] tests (29ms vs 40ms) ?
>>
>> No idea.  Microbenchmarks are notoriously fickle though, I will try 
>> and run this again over a larger sample size to smooth things out a bit.
>>
> 
> UTF-8 encoding. It has a cost.
> 
                           ^ measurable

-- 
Jason T. Greene
JBoss, a division of Red Hat



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