[GRASSLIST:164] calculating distances

[Scott Cunningham]

I've been reading more, and I realize now that it is possible to  
perform distance calculations with GRASS.  Cane someone give me a  
sense of how long it will take, though?  My dataset consists of 2000  
young girls with multiple observations over time (ie, 10 years of  
2000 observations on the same girl).  I have to calculate, therefore,  
20,000 separate distances.  How long will this probably take?