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Comment by comex | Hacker News Reader

Interesting. The flashing at least seems to be an isolated System Preferences bug, as I don't remember seeing it in any other applications.

Would be better to compare a larger number of UI interactions - Finder, Safari, Exposé/Mission Control, iTunes, etc., to more clearly establish a pattern rather than just claiming it anecdotally. Not saying the pattern isn't there, but proving it would be a breath of fresh in air in an area typically so subjective and dominated by perceptual biases.

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It's because the preference pane is being drawn by an XPC service, which is a separate process from System Preferences that's drawing the window chrome. This is for improved security, but synchronizing animations across multiple processes is difficult.

Not only that, it only flashes in certain areas of Sys Prefs.

For me, I see flashes only in General, Security & Privacy and so on. It looks fine in Dock, Mission Control and so on. I think it is just a bug in certain layouts.

Tiger didn't have Mission Control, but I certainly think there are other tests that could be done that really compare all aspects of the OS.

I can tell you that Mission Control is, at times (far too frequently) extremely laggy for me on OS X Yosemite. Couple that with apps leaking memory, leaving me with mere megabytes of free RAM, and my top of the line rMBP slows to a crawl.

Dashboard has become virtually unusable in Yosemite. "Laggy" is an understatement. If I'm activating it after a restart, it can take a full minute for the widgets to become active. The same selection is available instantly in Snow Leopard. Thank goodness I've got a partitioned drive, and can switch back and forth between Y and SL as needed.

Tiger had Exposé, which is close enough.

The "free RAM" statistic is meaningless. Are any applications in particular using lots of private memory?

It doesn't help that the styles updated to be super vibrant.

It highlights that the buttons are disabled then enabled when the animation has finished.

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