- Joined
- Jul 23, 2015
- Messages
- 47
- Motherboard
- Asus Z97MX-gaming 5
- CPU
- i7-4790K
- Graphics
- GTX 960
- Mac
- Mobile Phone
Yosemite IS suffering from poor scrolling performance (also on official hardware)
EDIT: See post #4 for testing instructions and conclusions: http://www.tonymacx86.com/general-h...g-poor-scrolling-performance.html#post1085381
I've noticed a lag when scrolling in Yosemite that wasn't present on older OSX versions (Lion compared here). In this video first a 2011 system with Lion showing smooth scrolling. Note that the handlebar always keeps up with the mouse. Then a 2015 system that is more powerful but has Yosemite instead. Notice the much less smooth scrolling and the handlebar that lags behind the mouse when moving quickly.
When scrolling in Lion, CPU use of mail.app never goes over 50 percent. When scrolling in Yosemite. CPU use of mail.app goes to 100 percent!!!
Scrolling smaller lists is less obviously lagged but the faster you scroll or the more items in the list, the more lag. When CPU use during scrolling reaches close to 100 percent lag is induced. This means, I assume, that something is processed during scrolling in Yosemite that wasn't in Lion which is apparently very inefficient.
The list being scrolled is a big list of my Gmail. For a long list, try console although it's not as pronounced there as in mail.app. Check how well the handlebar keeps up with the mouse when doing quick moves as well as CPU use when doing so repeatedly.
Example video with poor quality due to compression but look closely at how the handlebar follows the mouse pointer. In the first part it follows perfectly and the scroll is smooth. In the second part the handlebar has to chase the mouse when moving quickly and the scrolling isn't as smooth anymore.
Anyone else noticed this? I assume it's just per design due to the new transparency and visual candy or what not, but it's not very nice.
Video url: https://www.youtube.com/watch?v=vcsPlv3ilv8
[video=youtube;vcsPlv3ilv8]https://www.youtube.com/watch?v=vcsPlv3ilv8[/video]
EDIT: See post #4 for testing instructions and conclusions: http://www.tonymacx86.com/general-h...g-poor-scrolling-performance.html#post1085381
I've noticed a lag when scrolling in Yosemite that wasn't present on older OSX versions (Lion compared here). In this video first a 2011 system with Lion showing smooth scrolling. Note that the handlebar always keeps up with the mouse. Then a 2015 system that is more powerful but has Yosemite instead. Notice the much less smooth scrolling and the handlebar that lags behind the mouse when moving quickly.
When scrolling in Lion, CPU use of mail.app never goes over 50 percent. When scrolling in Yosemite. CPU use of mail.app goes to 100 percent!!!
Scrolling smaller lists is less obviously lagged but the faster you scroll or the more items in the list, the more lag. When CPU use during scrolling reaches close to 100 percent lag is induced. This means, I assume, that something is processed during scrolling in Yosemite that wasn't in Lion which is apparently very inefficient.
The list being scrolled is a big list of my Gmail. For a long list, try console although it's not as pronounced there as in mail.app. Check how well the handlebar keeps up with the mouse when doing quick moves as well as CPU use when doing so repeatedly.
Example video with poor quality due to compression but look closely at how the handlebar follows the mouse pointer. In the first part it follows perfectly and the scroll is smooth. In the second part the handlebar has to chase the mouse when moving quickly and the scrolling isn't as smooth anymore.
Anyone else noticed this? I assume it's just per design due to the new transparency and visual candy or what not, but it's not very nice.
Video url: https://www.youtube.com/watch?v=vcsPlv3ilv8
[video=youtube;vcsPlv3ilv8]https://www.youtube.com/watch?v=vcsPlv3ilv8[/video]