Sluggish Apps after time

Hi, a couple of things.... 1) love the recent changes and the addition of reports etc - very awesome! 2) I've noticed over time that my Zoho Application becomes "sluggish", almost like it's hanging on to fragments of records when they are changed or deleted. I duplicated the application and re-imported my data and it was zippy quick again for a while then eventually became sluggish again. It's not the end of the world to have to do a re-load like this, but didn't know if anyone had mentioned it and whether or not it might be easy enough to add in some kind of clean up utility that can do a sweep of an application to clean up fragments. Or if you perhaps already have a solution to this quirk? Thanks a bunch and keep up the very awesome, great work!