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I want to profile the execution of a program to see what in particular is slowing it down - whether it hits a memory cap or if my CPU is not powerful enough.

Activity Monitor (the one that comes with OS X) is great, but I don't think it can record data (i.e. I think you can only see current RAM and CPU usage, not usage from the past).

I want the usage broken down by process if possible, so I can control for other things spiking in usage.

Do you know of any application that has this functionality?

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If this is an app you're developing, take a look at Xcode's Instruments tool to profile this kind of thing. – Nathan Greenstein♦ Sep 22 '12 at 17:52
No, I'm not developing this app - it's third party. I am trying to figure out if buying more RAM will fix the problem, or if I just have a slow CPU... – BlackSheep Sep 22 '12 at 19:17

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You may want to look into OS Track. It's not the most stable and reliable app but free and I think it should do the things you need. To find our more you can check the screenshots on the developer's site.

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