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Memory usage measurement questions

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Memory usage measurement questions

Subject: Memory usage measurement questions
From: Rick Mann <email@hidden>
Date: Fri, 14 Mar 2008 13:33:14 -0700

Hi. I've written a tiny little command-line tool that installs a CGEvent tap and then enters a CFRunLoop(). It links against ApplicationServices and CoreServices and calls printf().

I wasn't sure if I was properly releasing some things, so I decided to take a peek at the memory usage in ActivityMonitor. I was shocked to learn that the app uses (even just after launch) 200 MB of real memory, and 842 MB of virtual memory. The executable is only 13K.

Why so much memory used? I guess I can forgive virtual memory use, but 200 MB of real mem? And really, does it need almost a gig of vmem?

How can I see more about how this memory is used.

Thanks!

--
Rick

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