lag and stuttered scrolling on riMac 5K?

Discussion in 'iMac' started by imaginaryfriend, Oct 29, 2014.

  1. imaginaryfriend macrumors member

    Joined:
    Apr 10, 2010
    #1
    I just got an i5, 295, ssd, 8gb ram 5K.

    noticed significant scrolling lag when using full screen mode (preview, Evernote especially, Safari is okay). read some forums this is common with mbp as well... scrolling is smoother on my 2 year old mba than riMac... hmmmm...

    anyone else getting this? will upgrade RAM Saturday to 24 GB.
     
  2. EnderTW macrumors 6502

    Joined:
    Jun 30, 2007
    #2
    return it. i have base iMac with 4k external and am not seeing any of that type of behavior.
     
  3. bwsteg macrumors 6502

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    Sep 25, 2012
    Location:
    Queens NY
    #3
    I have noticed the same on opera and safari. I have an i7, 295, 16gb ram, ssd
     
  4. dollystereo macrumors 6502a

    dollystereo

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  5. imaginaryfriend thread starter macrumors member

    Joined:
    Apr 10, 2010
    #5
    pioneers... ha.

    so people can really use preview to browse a big .pdf with no lag (continuous scrolling option, full screen)? if so, this would be helpful to determine if i need to return it...

    example pdf => http://www.nasa.gov/pdf/750614main_NASA_FY_2014_Budget_Estimates-508.pdf

    .pdf browsing in safari appears to be smoother...
     
  6. 5iMacs macrumors regular

    Joined:
    Oct 25, 2014
    #6
    For some reason scrolling through this PDF in Preview spikes the CPU (not a GPU thing...) even on non-retina systems, and in Mavericks as well. It's a mystery to me why it would be that much better on your MBA.
     
  7. dollystereo macrumors 6502a

    dollystereo

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    Location:
    France
    #7
    In my MBP is not smooth...
     
  8. steve23094 macrumors 68000

    steve23094

    Joined:
    Apr 23, 2013
    #8
    My mid-2012 rMBP scrolls smoothly. Will all the varying reports I think it's something to do with Yosemite.

    Edit: scratch that, notice it's happening on Mavericks too. No idea what the problem is.
     
  9. petvas macrumors 601

    petvas

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    Location:
    Mannheim, Germany
    #9
    Everything is smooth here but Mission Control and its animations. This is a software issue, not exclusive to the Retina iMac..
     
  10. bjmoose macrumors member

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    Oct 4, 2011
    #10
    My late 13 i7 rMBP on both internal and an external 27 non-retina monitor, Yosemite, scrolls through that PDF fast in Chrome and Preview with minor CPU impact.
     
  11. leenak macrumors 68020

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    Mar 10, 2011
    #11

    I don't get any lag on my RiMac from that PDF in Preview
     
  12. imaginaryfriend thread starter macrumors member

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    Apr 10, 2010
    #12
    wonder where the variability is coming from. for those with smooth scrolling - is there anything about your system that you think may be making it better?

    i also noticed it appears to be a CPU issue, processor gets going when scrolling.

    and for those with riMac - the more i zoom in on the .pdf in preview, the worse the lag gets. if you zoom in so that the width of the page fills the screen when in full screen mode, it becomes super laggy....

    wonder whats going on... any ideas?
     
  13. pasadena macrumors 6502a

    pasadena

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    Sep 12, 2012
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    Socal
    #13
    I don't get any detectable lag. I tried with Firefox, bot in tab and in fullscreen mode. Then Preview seemed ok until I tried full screen and it crashed. Keeps crashing with that PDF.
     
  14. leenak macrumors 68020

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    Mar 10, 2011
    #14
    I was viewing it in Preview, no crash. I didn't go through the whole thing though.
     
  15. macmee Suspended

    macmee

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    Dec 13, 2008
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    Canada
    #15
    I'm running a 4k monitor on my riMac and even still there's no lag, though I'm in Chrome.
     
  16. imaginaryfriend thread starter macrumors member

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    Apr 10, 2010
    #16
    gosh the computer is perfect except for this scrolling lag - considering i work a lot with annotating pdfs/evernote, this is frustrating.

    for those with no lag - what are your specs? could the i7/RAM make the difference?

    i also noticed the lag present in iPhoto when you zoom in and out on the thumbnail screen... it's pretty bad...
     
  17. pasadena macrumors 6502a

    pasadena

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    Socal
    #17
    It crashed when I started scrolling. Now it crashes when I open it. I probably should download the pdf again.

    ----------

    i7, M295X, 24Gb RAM (8GB stock + 16Gb Crucial).

    I did notice a good perf improvement when I added the RAM, but I didn't really do any lag tests, I just had a few beach balls here and there and adding the RAM got rid of that (except when starting up iTunes).
     
  18. macmee Suspended

    macmee

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    #18
    Are you sure the performance boost was because of the extra ram?
     
  19. imaginaryfriend thread starter macrumors member

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    Apr 10, 2010
    #19
    lag improves when playing with the display settings - definitely retina related. annoying. also strange how everything else is just so smooth.

    curious about machines that do not have any lag.
     
  20. 5iMacs macrumors regular

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    Oct 25, 2014
    #20
    I think part of the confusion here might be what constitutes significant/objectionable lag, so I'll try to be as descriptive as possible.

    I'm running on an i5/M290X and when I full-screen the PDF in Preview and view it at normal size for reading I can spin through the pages with the trackpad quickly and smoothly.

    When I zoom in really far, like the width of the page is half the screen, it gets choppier on updates but still feels like inertial scrolling without any delay in response.

    Nothing like the extreme glassy smoothness of an average web page in Safari, but has Preview ever been on par with that?
     
  21. imaginaryfriend thread starter macrumors member

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    Apr 10, 2010
    #21
    it's just crazy how i can play two 4K videos simultaneously full screen with no stutter... but it takes significant effort to scroll through a .pdf
     
  22. 5iMacs macrumors regular

    Joined:
    Oct 25, 2014
    #22
    Well...at the risk of dating myself, up to the early 2000's one of the most taxing programs on your computer (CPU, disk I/O, and graphics blitting) was Adobe Acrobat. It was one of the best ways to convince yourself that you had a faster machine when you upgraded.
     
  23. pasadena macrumors 6502a

    pasadena

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    Sep 12, 2012
    Location:
    Socal
    #23
    Yes. I used it for a couple of days before I added the RAM (it was delivered first :D). As I said I was getting a few beach balls, doing just normal stuff. I added 16Gb and did nothing else, and no more beach balls.
     
  24. EnderTW macrumors 6502

    Joined:
    Jun 30, 2007
    #24
    Again.

    Return your iMac, that is not normal behavior. If people were stuttering on scrolling, you'd see headlines all over the internet about how the retina iMac lags.
     
  25. imaginaryfriend thread starter macrumors member

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    Apr 10, 2010
    #25
    this seems to be a feature of other retina devices (18 page apple.com thread here => https://discussions.apple.com/thread/5547471?start=255&tstart=0) -- not just my iMac.

    there is no stuttering on safari, nor apps that i more commonly use. i have only found it to be an issue when dealing with preview, evernote and iPhoto. granted, these are just the examples i've come across - there may be more i may notice in the future.

    can you really do preview, full screen, with the .pdf above zoomed in a bit, with the continuous scrolling setting on with no lag/stutter? if you have a lot of thumbnail events, can you do full screen zooming in and out on iPhoto with no lag? if so... then i guess i should return...

    but it appears that a few other people are observing this lag, which makes me think it's not an isolated event.

    i don't think this is a dealbreaker for the machine though.
     

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