I generally agree with you, I didn't expect Iris Pro to be perfect for this setup. Actually after turning on "Reduce contrast" the speed is quite reasonable. I would be happy with that:
https://www.youtube.com/watch?v=BNac3VPZDKI&feature=youtu.be
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2015 Macbook Pro's Intel Iris 6100 is so choppy in Yosemite
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I generally agree with you, I didn't expect Iris Pro to be perfect for this setup. Actually after turning on "Reduce contrast" the speed is quite reasonable. I would be happy with that:
https://www.youtube.com/watch?v=BNac3VPZDKI&feature=youtu.be
Yeh that's pretty impressive without a dedicated card.
Out of interest which monitor do you prefer?
For comparison here is a video I made from the very same configuration using a fresh OS X Mavericks 10.9.5 install:
https://www.youtube.com/watch?v=lChtOGlEyvE&feature=em-upload_owner
Buttersmooth Mission Control on 11 million pixels.
Yeah, how the allowed such a terrible regression to happen is a crime. And it's not so much Apple engineers that I blame (if they are forced to ship, then they will ship), but management wanting a feature roller coaster instead of realizing that "stability is a feature".
When you tightly couple iOS and OS X features together for the purpose of marketing like with Continuity, it means you can't delay a release and with get issues like choppy Mission Control.
I don't think it's the main reason, because the release was 7 month ago, and it is still not fixed. My theory is, that they believe, that it is "good enough" as it is, because most people don't use or don't even recognize it as an issue.
Correct me please if I'm wrong, but versions prior to Yosemite did not make such intensive use of transparencies and high-contrast filters, which have turned Mission Control under Yosemite into a first-class consumer of CPU cycles. Call me a pessimist, but I am still not convinced that current Intel chipsets are able to handle this computational load, and I fear that suboptimal software is not the only issue here.
About a month ago I bought a new 2015 13" rMBP which I run at the default resolution and with transparency on. I have to say that with multiple applications and workspaces open, I do not notice the ui lag that some of these videos of shown. Granted it's not 100% smooth, but I can certainly see all the frames during the transition when accessing mission control.
Do you use an external display?
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I think transparency is not the cause of this issue, since turning on "Reduce transparency" helps nothing.
Occasionally I connect it via HDMI to a 1920x1080 monitor, however, I always run the laptop in clamshell mode.
This issue gets definitely worse the more pixels your GPU has to drive. 13" rMBP on default resolution means 2560x1600 pixels (which is 4MP), 1080p is 2MP. Even a slow algorithm can drive a 2-4MP config smoothly.
(15" rMBP: 5.1MP, Thunderbolt Display: 3.7MP)
Right. Actually it is even worse, because OS X renders everything in Retina on Retina screens. So for example, if you select "More Space" on 15", it means:
1. OS X will render on 3840x2400 (9.2MP)
2. Then rescales it to 2880x1800 (5.1MP) 60 times a second
It is a very difficult task to rescale such a big amount of data even for today's hardware. When you select "Default", no scaling is needed because the displayed pixels will be the same as the rendered.
(Just try to rescale an image with this resolution in Photoshop... It takes time.)
Would it be possible for you to make a video of it and upload on Youtube? It's hard to believe that things are better after all this time :/
That's reassuring, as smooth as mavericks video you posted some posts upper? Thank you!
Thanks for the video. Any chance on seeing how the Iris Pro performs with just the notebook display (i.e without the 2 external monitors)?
I don't see the point. With this setup it is almost 60 fps, without the external displays it would be 2-3 times faster. Even Yosemite with a new boot can drive the internal display by its own.
I have noticed significant lag on my Late 2013 rMBP with the GT 750m, but only when using the Iris Pro iGPU. I'm hoping El Capitan fixes this.
I can't say anything about a long uptime usage yet (I have installed it on an external HDD, not as my main system), but let's hope the best. (It can still get slower by time.)