iTunes jittery lag.

iRyu

macrumors regular
Original poster
May 22, 2010
101
1
So I updated everything on my high end retina macbook pro. everything thing is smooth as well BUT my iTunes scrolling is lag.

No matter in my songs library or iOS App Store. The scrolling is jittery lag. Any of you RMBP user having this problem?
 

AZREOSpecialist

macrumors 68020
Mar 15, 2009
2,117
925
Perhaps we need a definition of "laggy". I just launched the Mac app store and iTunes, both scroll just fine to me. When someone says "laggy" I'm interpreting that to mean a noticeable (i.e., significant) delay between when you initiate scrolling with your hands and when you actually see it on the screen. I experience no perceptible delay/lag of any kind. When I scroll up or down, the entire app store or iTunes store page moves up and down smoothly.

Am I not doing this correctly?
 

AZREOSpecialist

macrumors 68020
Mar 15, 2009
2,117
925
10% slower graphics on 2.3 vs 2.6?

I just read in another thread here on MacRumors quoting Intel's specifications for the integrated graphics in the RMBP. Intel states that the integrated GPU runs at 1.1 GHz on the 2.3 model and 1.25 GHz on the 2.6 model. That makes integrated graphics on the 2.3 model about 12% slower than the 2.6. Conversely, integrated graphics in the 2.6 is 14% faster than the 2.3. I can see how this may be noticeable in some situations, but it still seems like a rather minor difference that could account for what folks are seeing.

What interests me is that the reports of laggy, not laggy, seem to vary from machine to machine. I wonder if this small GPU difference could be a variable for some people?
 

iRyu

macrumors regular
Original poster
May 22, 2010
101
1
I just read in another thread here on MacRumors quoting Intel's specifications for the integrated graphics in the RMBP. Intel states that the integrated GPU runs at 1.1 GHz on the 2.3 model and 1.25 GHz on the 2.6 model. That makes integrated graphics on the 2.3 model about 12% slower than the 2.6. Conversely, integrated graphics in the 2.6 is 14% faster than the 2.3. I can see how this may be noticeable in some situations, but it still seems like a rather minor difference that could account for what folks are seeing.

What interests me is that the reports of laggy, not laggy, seem to vary from machine to machine. I wonder if this small GPU difference could be a variable for some people?
Well, mine is 2.6 model. Any solving problem? My low end Mac mini run SL have the same library but scrolling on it is butterly smooth. :confused:
 

mjn298

macrumors regular
Oct 25, 2011
201
0
Palisades, Washington, DC
Yeah I dunno. I've never had iTunes run smooth on any machine.. I think it is just very mediocre software. ML's added resource burden combined with the fact that the 650m is relatively underpowered (even factory overclocked like it is in the rMBP) for pushing all the pixels on the Retina display is causing that.

But really, iTunes has always kinda mismanaged resources.
 

AZREOSpecialist

macrumors 68020
Mar 15, 2009
2,117
925
Yeah I dunno. I've never had iTunes run smooth on any machine.. I think it is just very mediocre software. ML's added resource burden combined with the fact that the 650m is relatively underpowered (even factory overclocked like it is in the rMBP) for pushing all the pixels on the Retina display is causing that.
How do you figure?
 

mjn298

macrumors regular
Oct 25, 2011
201
0
Palisades, Washington, DC
How do you figure?
if your'e asking about the 650m (really it's actually a gtx 660m based on clock speed), it's because it's not really a power card anymore and running in 1920x1200 (which i think is the standard but i'm not sure) it renders everything at 3840x2400 (i think) and then scales it down. That's pretty demanding and while all around performance will be fantastic, you'll probably notice chop in certain things as they figure out more efficient ways to handle it/get juicier GPUs in there.

if you're asking about my statement that "iTunes is just mediocre software" that's just my personal anecdote, I've never liked it and never use it. I don't think it makes efficient use of hardware.
 

mjn298

macrumors regular
Oct 25, 2011
201
0
Palisades, Washington, DC
I don't know why you're being so condescending. I don't think it is at all unreasonable to say that the discrete GPU is underpowered to push all these pixels. it still works great, though.

a much bigger thing will be the upgraded integrated graphics in the upcoming intel chipset.
 

AZREOSpecialist

macrumors 68020
Mar 15, 2009
2,117
925
I don't know why you're being so condescending. I don't think it is at all unreasonable to say that the discrete GPU is underpowered to push all these pixels. it still works great, though.

a much bigger thing will be the upgraded integrated graphics in the upcoming intel chipset.
I'm sorry, and you're right. I was being rude and you didn't deserve it. I apologize. I am just really annoyed about people constantly talking about an issue that I cannot, for the life of me, duplicate on my RMBP. I'm not saying it doesn't exist for some people, but others have gone over the deep end by saying it's a hardware issue, it's underpowered, etc.

Perhaps I should send my RMBP back to Apple as defective because it's behaving differently than everyone else's.
 

mjn298

macrumors regular
Oct 25, 2011
201
0
Palisades, Washington, DC
I'm sorry, and you're right. I was being rude and you didn't deserve it. I apologize. I am just really annoyed about people constantly talking about an issue that I cannot, for the life of me, duplicate on my RMBP. I'm not saying it doesn't exist for some people, but others have gone over the deep end by saying it's a hardware issue, it's underpowered, etc.

Perhaps I should send my RMBP back to Apple as defective because it's behaving differently than everyone else's.
It happens - I've done it before, too.

In my time w/ rMBP's I didn't notice anything that bothered me but neither the 600m series nor the HD 4000 series were designed with this kind of pixel density in mind (based on research I've done to the extent of the info available to me), and rendering in 3840x2400 and scaling to 1920x1200 is a big thing to ask of mobile GPUs and especially integrated graphics.

That said, Apple is a huge company with a huge reputation to protect and I don't think they would release a product that they hadn't extensively tested. They are pushing the envelope to provide an entirely new design and display option with existing hardware that wasn't engineered with it in mind.

It will be a team effort between nVidia (if apple stays with them) and Intel to provide the firepower and Apple to provide the software optimization to make improvements on whatever issues may exist.

I think the current hardware performs admirably and I was so impressed with the rMBP.