On Sun, 15 Nov 2009 22:14:32 -0800 (PST), Chris Carson <cucar...@yahoo.com> said: >The application runs pretty well, and running it through the Leaks instrument there are no leaks except for 16-bytes when the application is first starting caused by IOUSBLib. However, looking at it in the Activity Monitor, the real memory used starts off at 25 MB and steadily grows to 250+ MB while the virtual memory starts off at about the same and steadily grows to about the same or sometimes close to 500MB, over the course of several minutes. This especially happens if I don't move the mouse for a while, or don't have the application in focus. As soon as a move the mouse or bring the application into focus, it's as if an autorelease pool is drained and the memory drops back down to 30-40MB real and 30-40MB virtual. This is annoying since the application hangs for 5 seconds or so when this memory draining is occurring. Has anyone dealt with this before? Any ideas on what could be causing this and how to work around it?
You have already understood it. :) If you autorelease stuff (or ask the framework to make you an autoreleased object), you are saying: Release this when you feel like it. "When you feel like it" doesn't happen when the app isn't getting any events in the background. The solution is either Don't Do That (i.e. if these are objects that you own, then release them, don't autorelease them) or (more likely) introduce your own autorelease pool into your loop, releasing it at the bottom of the loop or (even more likely) at the bottom of every n loops, where n is some convenient integer. This point is nicely covered (though rather densely, and without an example) here: http://developer.apple.com/mac/library/documentation/Cocoa/Conceptual/Memory Mgmt/Articles/mmAutoreleasePools.html "If you write a loop that creates many temporary objects, you may create an autorelease pool inside the loop to dispose of those objects before the next iteration. This can help reduce the maximum memory footprint of the application." m. -- matt neuburg, phd = m...@tidbits.com, <http://www.tidbits.com/matt/> A fool + a tool + an autorelease pool = cool! AppleScript: the Definitive Guide - Second Edition! http://www.tidbits.com/matt/default.html#applescriptthings _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
