I hadn't noticed any perceptible performance differences in Yosemite on my 2011 MBP.
After reading this article, I opened up System Preferences on an external WQHD monitor and... yes, indeed. That transition is not very smooth. Informally, it doesn't seem slower ...it's just not as smooth as the old effect.
As another poster noted, in Yosemite those panels now use a cross-dissolve effect instead the simpler slide and fade in earlier versions of OSX.
Thing is, I'm not sure I would have noticed this in a million years.
How much time do you guys spend clicking around in System Preferences every day? This really affects you?
I don't know of any other apps with preference panes that use this effect. I tried two other apps (iTunes and Pages) and neither one uses the cross dissolve.
I understand that this small regression is merely emblematic of the issues some of you are experiencing; none of you are claiming that System Preferences itself has a huge impact on your daily lives. But this is such a ridiculous regression to select as the poster child for Yosemite's perceived woes.
I totally agree the example I posted is ridiculous. Let me explain why I did it.
I was a hackintosh user for years. I got an old lenovo from 2007 with an intel core 2 duo and thought it would be fun to install OS X Tiger on it. Install went smoothly except the intel integrated graphics wasn't supported.
I decided to check out System Preferences to see how much had changed in all these years. I immediately noticed this perfectly smooth animation between panels. I couldn't believe it was so slow - and with no graphics driver! So I tried it on my rMBP and it was incredibly laggy. I just quickly recorded it with my phone and thought I'd show just one small part of OS X that really represents a much bigger picture of UI performance regressions.
Hm, I don't think this is a good example if the point is to talk about general graphics slowness, because the slowness here is not due to generic graphics issues.
This is slow because each pane is running in its own process and it's doing some complicated cross-process graphics stuff to get all the drawing into the same window. This changed in… maybe Lion?
After reading this article, I opened up System Preferences on an external WQHD monitor and... yes, indeed. That transition is not very smooth. Informally, it doesn't seem slower ...it's just not as smooth as the old effect.
As another poster noted, in Yosemite those panels now use a cross-dissolve effect instead the simpler slide and fade in earlier versions of OSX.
Thing is, I'm not sure I would have noticed this in a million years.
How much time do you guys spend clicking around in System Preferences every day? This really affects you?
I don't know of any other apps with preference panes that use this effect. I tried two other apps (iTunes and Pages) and neither one uses the cross dissolve.
I understand that this small regression is merely emblematic of the issues some of you are experiencing; none of you are claiming that System Preferences itself has a huge impact on your daily lives. But this is such a ridiculous regression to select as the poster child for Yosemite's perceived woes.