IMovie 09 uses up 4GB of RAM in less than 2 minutes

Hi,
The topic says it all i think..
To be honest i don't know if i had this issue before Snow Leopard i have only been using it for about a week. I have a MacBook Pro (Early 2008) 2.6GHz with 4GB RAM installed. I have never had any issues with the RAM being used up this fast before ever (and i'm a pretty heavy photoshop user and gamer).
With just a simple project and little events i make a short clip, some transitions and a background tune. Then i minimize iMovie to check my Mail or another app and notice the mac became horribly slow and minimizing takes a good minute. Then i check Activity Monitor and iStat Pro to find within just a few minutes i not only used up 4GB of RAM but only am well into 4GB Swap File usage, i need to restart to turn my Mac back into the fast Mc it was before i started iMovie.
Before writing this i did a few tests with garageband and a couple of other apps including Adobe Suite etc... i still have a little over 2GB RAM free. Then i start iMovie, open my project and mess around a little.... wham, RAM gone, is this what's known as a memory leak ?
Any thoughts on this? I started experimenting / learning iMovie because i have a wedding DVD to make soon, i need this software to work right.
Thanks in advance
Jay

MPEG2 and AVCHD are two different codecs. Your footage will be one or the other, but not both. MPEG2 is used more often in standard definition cameras.
Having said that, your memory problem is unusual. iMovie uses a lot of memory, and if you are constrained on memory, it uses swap files. However, mine has never used up 4GB of real memory in 2 minutes. It looks like you have a memory leak somewhere (which could be a bug in iMovie).
I don't know how to find it since I can't replicate it on my system.
One thing that may help you monitor this is the free application called [MemoryStick|http://www.tidbits.com/matt>. You can install it and monitor your swapfiles real time. You can also see how much real memory and virtual memory iMovie is using at the moment through Activity Monitor (which I presume you are already doing.)
With MemoryStick, if I notice that I have 5,6, or 7 swapfiles going, and they are over 2GB (they have been as high as 4GB) then I know it is time to re-boot.

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