> 
> It certainly makes quite a difference as I measure it:
> 
> doing select(1) from a 181000 page table (completely uncached) on my
PIII:
> 
> 8.0 : 32 s
> 8.1 : 25 s
> 
> Note that the 'fastcount()' function takes 21 s in both cases - so all
> the improvement seems to be from the count overhead reduction.

Are you running windows?  There is a big performance improvement in
count(*) on pg 8.0->8.1 on win32 that is not relevant to this debate...

Merlin

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