Tool Needed to Diagnose Android Apps Causing Laggy-ness

For the most part I like my MT3G Android phone, but I have occasionally experienced some problems with laggy-ness. After months of no major problems, it cropped up big-time recently. Really big-time--so much that even a re-boot only cured it for a few minutes. I could not think ot any obvious cause, but I figured it must correlate it to an app installation event--either a new app, or perhaps an update. The problem was, I couldn't think of any likely suspects.

This persisted for several days. I was very, very close to doing a master re-set, out of desperation. But then I had some time on my hands today, and I was poking around with Wing Tseng's terriffic Task Manager app, and I think I may have found the offending application (no naming names, at least not yet, because I'm not sure).

So anyway, that got me thinking...it is really a showstopper when your phone gets hit with that degree of lagginess. We really need a tool to help troubleshoot where the lag may be coming from. This is what I have in mind--an app that:

1. Keeps a log of date/time for all installs and updates of apps.
2. Tool also monitors CPU usage, and reports by date/time.

These 2 pieces of information could be very helpful in diagnosing the likely offending application. Extra credit if the app itself provides suggestions.