iTunes jittery lag.

Discussion in 'MacBook Pro' started by iRyu, Aug 5, 2012.

  1. iRyu macrumors regular

    Joined:
    May 22, 2010
    #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?
     
  2. stevelam macrumors 65816

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    Nov 4, 2010
    #2
    Have you tried browsing the mac app store too? Also laggy!
     
  3. isagheer macrumors newbie

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    Sep 17, 2011
    Location:
    Toronto, ON
  4. AZREOSpecialist macrumors 68000

    AZREOSpecialist

    Joined:
    Mar 15, 2009
    #4
    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?
     
  5. AZREOSpecialist macrumors 68000

    AZREOSpecialist

    Joined:
    Mar 15, 2009
    #5
    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?
     
  6. iRyu thread starter macrumors regular

    Joined:
    May 22, 2010
    #6
    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:
     
  7. mjn298 macrumors regular

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    Oct 25, 2011
    Location:
    Palisades, Washington, DC
    #7
    Do you mean "choppy" or actual I/O delay (lag)
     
  8. iRyu thread starter macrumors regular

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    May 22, 2010
    #8
    Scrolling choppy.
     
  9. mjn298 macrumors regular

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    Oct 25, 2011
    Location:
    Palisades, Washington, DC
    #9
    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.
     
  10. AZREOSpecialist macrumors 68000

    AZREOSpecialist

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    Mar 15, 2009
    #10
    How do you figure?
     
  11. mjn298 macrumors regular

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    Oct 25, 2011
    Location:
    Palisades, Washington, DC
    #11
    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.
     
  12. AZREOSpecialist macrumors 68000

    AZREOSpecialist

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    Mar 15, 2009
    #12
    I see, so you are just assuming. I'm glad we cleared that up.
     
  13. mjn298 macrumors regular

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    Oct 25, 2011
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    Palisades, Washington, DC
    #13
    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.
     
  14. AZREOSpecialist macrumors 68000

    AZREOSpecialist

    Joined:
    Mar 15, 2009
    #14
    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.
     
  15. mjn298 macrumors regular

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    Oct 25, 2011
    Location:
    Palisades, Washington, DC
    #15
    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.
     

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