How do I locate applications that drain my battery on a MacBook Pro? I purchased a new Macbook Pro and have since downloaded a ton of applications and add ins.  I think some of these apps are responsible for draining my battery too quickly.


How do I identify what applications are responsible for this, or otherwise experience what a "clean machine" feels like?


Back in the day I used Extensions Manager on OS 7.x to turn off add ins that would slow my machine down.  What is the equivalent in OSX?
The Activity Monitor template in Instruments shows average CPU use over time:



You can also use top -o time or Activity Monitor to sort processes by CPU time.



CPU time doesn't always correlate with CPU use though. It's reset when a process exits, so the list won't include old mdworker processes or applications that have been quit manually.