[pybsddb] len() sometimes slow for bsddb3 backed shelves

[Gregg Lind]

More info:

bsddb3  version 4.7.2

db version : db4-4.3.29-9.fc6

I tried doing:

db_stat -f -d mydb.db, and *this* was slow as well.  I guess I don't get 
what the "fast" flag is for, if it's going to go traverse the db 
anyway.  The reason I'm trying to get db lengths is so that I don't 
*have* to traverse the db. 

So, this seems to be outside your specific domain, but if you have 
ideas, I'd love to hear them!

Thanks,

Gregg