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See Cover Flow framerate System
I stumbled on this useless but curious "defaults write" trick for the Finder that displays the frame rate when you flip through files in Cover Flow. I've only tested it in Mountain Lion.

The following will show the cover flow frame rate (as frames per second) within the Finder alongside each filename when flipping through files. On my system I get around 58 FPS consistently; try and beat that! I'm interested to see how retina MacBook Pros do, and, as such, this could be a useful if non-scientific benchmarking trick:

defaults write IKImageFlowShowFrameRate 1;killall Finder

To get rid of it:

defaults delete IKImageFlowShowFrameRate;killall Finder

[kirkmc adds: I, too, get 58 fps on my Mac mini, the same on my retina MacBook Pro. (Actually, it looks like it peaks at 58.87.) This suggests that there's something in the system that is limiting it, or that it simply can't go any faster.

I'll agree with the terms "useless but curious," but I'm sure someone will find something interesting to do with it.]
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The following comments are owned by whoever posted them. This site is not responsible for what they say.
See cover flow framerate
Authored by: Havner on Sep 11, '12 08:03:17AM

Yes kirkmc, it's called VSYNC ;-)

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See cover flow framerate
Authored by: loadbang on Sep 17, '12 08:12:25AM

Or as Apple call it 'beamsync'.

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See Cover Flow framerate
Authored by: bonobob on Sep 11, '12 02:15:34PM

2.6 GHz rMBP: 58.something fps max. Usually not that high.

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See Cover Flow framerate
Authored by: theBatt on Sep 12, '12 07:02:40AM

i got a 59.31 fps on a Macbook Pro 13" 2.4Ghz with 8Gb ram

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See Cover Flow framerate
Authored by: applemandesign on Sep 20, '12 06:43:48AM

59.19 w/ imac 3GHZ

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