generating reports takes minutes

[Fred Schaer]

Hi,

I'm using gnucash with data that starts in 2002 - that is 4 years of data...
Generating a report seems to take minutes - and I generate several at 
startup - :(

Is there a way to improve this "speed" ?
Report generation is becomming a pain, and I feel it's horribly slow 
compared to M$ Money which only takes seconds ...

Can I delete a few years data ? and how ?

Thanks && regards