Quitting Apps in IOS

Discussion in 'iPod touch' started by Absolute-Zero, Jan 2, 2011.

  1. Absolute-Zero macrumors newbie

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    #1
    Wirelessly posted (Mozilla/5.0 (iPod; U; CPU iPhone OS 4_2_1 like Mac OS X; en-us) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8C148 Safari/6533.18.5)

    Is there any point or advantage in quitting apps in IOS? You know when you double click the home button. Does it save battery or something? Kind of like quitting apps in OS X.
     
  2. Apple... macrumors 68020

    Apple...

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    #2
    Frees up RAM, conserves battery life. I kill my apps constantly.
     
  3. NT1440 macrumors G4

    NT1440

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    #3
    It does neither of these things because none of those apps are running unless they fall under a very limited scope of purposes.
     
  4. Apple... macrumors 68020

    Apple...

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    #4
    Really? Then why does my system slow down/ battery life decrease when I have more apps running?
     
  5. NT1440 macrumors G4

    NT1440

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    #5
    System? Are you talking about iOS or OSX?

    iOS doesn't have "true" multitasking (with very few specific exceptions), instead it basically puts apps on pause (these are layman's terms by the way) until they are launched again.
     
  6. TuffLuffJimmy macrumors G3

    TuffLuffJimmy

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    #6
    Placebo effect? Do you have any evidence or proof?
     
  7. Apple... macrumors 68020

    Apple...

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    #7
    iOS - sorry. I know it doesn't have "real" multitasking (only WebOS does ;)), but that doesn't mean RAM or battery life doesn't get used up. To a certain degree, it's still multitasking.
     
  8. NT1440 macrumors G4

    NT1440

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    #8
    The apps aren't running, so if the OS needs more RAM, it will dump one of the "backgrounding" apps. There is literally no draw on the battery because the app simply isn't running, with the exception of apps that are finishing a task, or VOIP or music streaming/playing apps.
     
  9. rgarjr macrumors 603

    rgarjr

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    #9
    I have a habit of knocking off apps frequently.
     
  10. NT1440 macrumors G4

    NT1440

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    #10
    I only due it with the NYT app because it crashes often when I try to pull it up after recently quitting out of it.
     
  11. Blakeco123, Jan 2, 2011
    Last edited: Jan 2, 2011

    Blakeco123 macrumors regular

    Blakeco123

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    #11
    im sorry, but what is TRUE multitasking? is it like have more than one window open?
     
  12. NT1440 macrumors G4

    NT1440

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    #12
    Its the name people here have assigned to a system capable of running more than one app at a time and have it actually running in the background. Very few mobile OS's currently do this because of battery and cpu limitations.
     
  13. Apple... macrumors 68020

    Apple...

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    #13
    I realize that. Still...

    Palm/ HP's WebOS is a perfect example of what you'd call "true" multitasking.
     
  14. NT1440 macrumors G4

    NT1440

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    #14
    Yup, but even that system has a few limitations on it.

    As for the "Still...", still what?
     
  15. Apple... macrumors 68020

    Apple...

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    #15
    Why does it seem like there's less RAM?
     
  16. TuffLuffJimmy macrumors G3

    TuffLuffJimmy

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    #16
    Because the applications still live in the RAM until that RAM is needed at which point the OS will clear out any RAM it has to in order to make room for the current application. This uses little to no battery life.
     
  17. Apple... macrumors 68020

    Apple...

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    #17
    Okay. Maybe I'm just being stupid tonight (it's quite late where I am), but I feel like I made this thread longer than what it should've been. Sorry - and thanks!
     
  18. thegman1234 macrumors 6502

    thegman1234

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    #18
    I can attest to the fact that the "backgrounded" apps do use at least some memory to hold their save state and launch quickly. I have experienced lag coming from the OS with many apps "backgrounded" on the iPad. Opening the task bar and manually quitting them remedied the issue. Coincidence, I don't think so... but maybe.

    Now, the fact that the iPad has half the RAM that the iPhone 4 does may be why this happened, as I have never experienced this on my iPhone. But I can't imagine that the iPad version of the OS wouldn't know to make up for the hardware difference.
     
  19. Apple... macrumors 68020

    Apple...

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    #19
    Exactly what I was trying to explain!
     
  20. thegman1234 macrumors 6502

    thegman1234

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    #20
    I don't care what the continuous belief is of how multitasking really works in iOS 4, if I'm experiencing lag whilst many apps are open in the task bar and it's remedied by manually closing those apps, I think it's a safe assumption to say that those backgrounded apps are using at least some RAM.
     
  21. TuffLuffJimmy macrumors G3

    TuffLuffJimmy

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    #21
    They are. And then that RAM is freed when a different foreground application needs it.
     
  22. trsnrtr macrumors 6502

    trsnrtr

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    #22
    Evidently it's a slow and less than perfect process because I've remedied apps that became sluggish by stopping, closing programs, and then restarting the app. Angry Birds comes to mind.

    Also, I had a RPG (don't remember the name) that would often display a message on start up that would say something to the effect of "Not enough memory. Close some applications and restart game."
     
  23. roadbloc macrumors G3

    roadbloc

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  24. thegman1234 macrumors 6502

    thegman1234

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    #24
    Wirelessly posted (Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_2_1 like Mac OS X; en-us) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8C148 Safari/6533.18.5)

    My point exactly.
     
  25. applefanDrew macrumors 65816

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    #25
    of course the backgrounded apps are using ram. thats where they are stored...in ram. There's no paging in iOS. Yea the lag happens b/c the foreground app needs more ram...iOS sees that, eliminates the contents of ram and gives the foreground app the necessary amount of ram of what was just cleared. the lag happens b/c that process of clearing and reallocating takes a second or two. As for battery life, it is not effected by the "saved" apps. They just sit in Ram doing nothing.
     

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