[Zope-dev] KeywordIndex performance / multiunion

[Seb Bacon]

Tim Peters wrote:
> [Seb Bacon]
> 
>>>But main the reason I'm posting is to wonder if there any reason not
>>>to use the multiunion operator instead of the union operator in
>>>UnIndex.py... it should be faster, right?  It seems a touch faster in
>>>some informal tests.
> 
> 
> [Casey Duncan]
> 
>>Yes, it probably should be used. I think it is much faster when
>>unioning very small and very large sets as well. Tim would know
>>better, tho.
> 
> 
> time.clock() knows best <wink>.

I asked time.clock(), and it says the difference between union and 
multiunion is not statistically significant in my scenario (7 sets of 
27k catalog data record ids, with about 25k in the intersection of all 7).

So I'm not going to bother changing this in UnIndex.

Seb