XCode Simulator running slow

Discussion in 'iOS Programming' started by lastcall, Dec 23, 2013.

  1. lastcall macrumors member

    lastcall

    Joined:
    Jan 10, 2013
    #1
    I'm running XCode 5 with the latest Mavericks 10.9.1 update, and whenever I use the iOS 6.0/6.1 simulator,
    my app runs extremely slow with choppy graphics.

    I found this command after searching on the subject:
    > sudo sysctl -w kern.timer.coalescing_enabled=0

    But I have absolutely no idea what it does or what effects it has on my computer.
    I don't understand why I even need to do it at all.
     
  2. DannyBres macrumors 65816

    DannyBres

    Joined:
    Oct 30, 2007
    Location:
    UK
    #2
    Is the app doing something stupid that is CPU/GPU intensive?
     
  3. Duncan C macrumors 6502a

    Duncan C

    Joined:
    Jan 21, 2008
    Location:
    Northern Virginia
    #3
    I remember reading about that, but don't recall the specifics. It is legit anyway. It's not like somebody's trying to get you to type "sudo rm -rf /" or something.

    I'd suggest googling it.

    Are you doing a lot of logging (using printf, NSLog, or debugger breakpoints with logging)? Those really slow down your code a lot.
     
  4. lastcall thread starter macrumors member

    lastcall

    Joined:
    Jan 10, 2013
    #4
    This is old app of mine that has ran smoothly in the past, in both release and debug mode. The only thing that has changed is Mavericks.

    If I change to a different simulator other than iOS 6.0/6.1, the problem seems to go away. But, this is very odd behavior. Something that I shouldn't have to fix myself, as it seems to be related to the operating system.
     
  5. Tander macrumors 6502a

    Tander

    Joined:
    Oct 21, 2011
    Location:
    Johannesburg, South Africa
    #5
    Which version of Xcode 5 are you running? 5.1?

    If so.. from the release notes:

    Hope this helps.
     

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