Sandboxed apps perform poorly

Apps now sandboxed -- e.g., iPhoto and Mail -- perform very poorly compared to previously (Snow Leopard). iPhoto for example takes 5-7 seconds at launch while the gear spins, and an equal amount of time at Quit. Mail always seems a couple of seconds behind my clicks.
Both apps were near instantaneous under Snow Leopard.
I assume this is due to being sandboxed into a container file.
Any suggestions to improve performance?
System 1: Mini 2010 with 2 x 500 GB drives at 7200 RMP, Raid 0 striped into one volume
System 2: MacBook Air 2011 with 256 GB SSD
John

You could be running into memory problems -- at least, that's what it usually us when this sort of thing happens to me. I typically leave my machine on and logged in all the time, just letting it sleep when I haven't used it for a while. I also tend to leave Safari and Mail open at all times. I've noticed that sometimes, my machine will slow down, and at those times, Activity Monitor reports that there's no free memory. Safari is usually the culprit, hogging all available memory for itself. I imagine it must have some sort of memory leak, which means it is failing to properly release memory that it is no longer using, resulting in a constant escalation of memory usage. Quitting Safari and relaunching it fixes the problem.
Check Activity Monitor. If the pie chart has very little green, this is probably your problem. Sort the list by Virtual Memory, and you should see the culprit at the top. Right now, I see that Safari on my system is using up 1.27 GB of virtual memory, leaving me with a teeny wedge of green on the pie. Guess it's about time for me to quit Safari!

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