Microsoft employees commonly describe Windows 8 as having both a Render thread and UI thread.

Typically they say the Render thread performs animations and the UI thread handles most other operations: parsing, layout, applying templates, data binding, input processing, most app callbacks, etc.

Animations can be calculated from beginning to end when they are created. Sometimes the changes to the property being animated don’t affect rest of the objects in a scene. These are called independent animations and they are run on the composition thread instead of the UI thread. This guarantees that they remain smooth because the composition thread is updated at a consistent cadence...

Is this a common architecture or unique to Windows 8? What about Windows Phone 8? Android? iOS?

closed as too broad by gnat, durron597, user22815, Bart van Ingen Schenau, Kilian Foth Oct 27 '15 at 6:57

Please edit the question to limit it to a specific problem with enough detail to identify an adequate answer. Avoid asking multiple distinct questions at once. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.

  • BeOS did something like that, but I don't remember the specifics. Made it very responsive on older hardware. – GrandmasterB Jul 28 '13 at 2:02

AmigaDOS did, which is why you still find Amigas running small TV station text feeds.

  • would you mind explaining more on what it does and why do you recommend it as answering the question asked? "Link-only answers" are not quite welcome at Stack Exchange – gnat Sep 7 '13 at 6:09
  • Well, frankly, it's a poor question, asking simply for exemplars of OSes that do this. So the answer is appropriate, albeit short. – Ross Patterson Sep 7 '13 at 13:06
  • the link you refer to says nothing about UI / Render threads, how would readers tell if your answer is correct or not? Agree that the question is poor (quite a pity that my close vote on it has expired), but frankly, your answer looks even worse – gnat Sep 8 '13 at 15:13

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