[mrinterweb]

I have found this to be the case at times. Not all apps are created equally and some are less responsible with their memory and how many CPU cycles they consume. With a true multiprocess OS like Android, this can be problematic as background applications can be unnecessarily greedy. One application that can help determine what applications are consuming CPU, memory, and battery is "System" by NextApp, Inc. With System's monitoring capability you can often determine which applications are misbehaving.

I once was trying to figure out why my battery was only lasting four hours. I used System's monitoring and figured out that the Facebook app was consuming >90% of CPU cycles. I learned later that the bug was confirmed and that Facebook fixed the problem, but in the meantime, I was able to uninstall Facebook and thus I restored my phone's battery life and responsiveness.

I'm sure there are plenty of other good system monitoring applications for Android. System is the only one I have used.