I was still having issues with the redraw when using ADW/Launcher Pro and just came across this in the BB forum and thought I would post it here for others to use. I take no credit for it, I am only reposting it.
Credit to samsonite801
If you use ADW or LauncherPro and if after using your browser, email or any other apps for awhile, then if you press the 'HOME' button, if it takes forever to redraw your home screen, and you are sick of that HORRIBLE LAG, then try this: In a terminal,
type su and enter.
Then type echo ro.HOME_APP_ADJ=1 >> /data/local.prop and enter.
Now evaluate whether or not this fixes your lag.
If you want to undo what this command does, simply remove that toggle from: /data/ local.prop
OG post can be found here: FIX: Reduce REDRAW with launcherpro/ADW *Credit to samsonite801