Update Timers.md
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We highly recommend never using bare timers and always using this mixin, it will save you from a lot of hard to track down bugs.
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## InteractionManager
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One reason why native apps feel so good performance wise is that barely any work is being done during an interaction/animation. In React Native, you can use `InteractionManager` that allows long-running work to be scheduled after any interactions/animations have completed.
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Applications can schedule tasks to run after interactions with the following:
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```javascript
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InteractionManager.runAfterInteractions(() => {
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// ...long-running synchronous task...
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});
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```
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Compare this to other scheduling alternatives:
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- requestAnimationFrame(): for code that animates a view over time.
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- setImmediate/setTimeout/setInterval(): run code later, note this may delay animations.
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- runAfterInteractions(): run code later, without delaying active animations.
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The touch handling system considers one or more active touches to be an 'interaction' and will delay `runAfterInteractions()` callbacks until all touches have ended or been cancelled.
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InteractionManager also allows applications to register animations by creating an interaction 'handle' on animation start, and clearing it upon completion:
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```javascript
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var handle = InteractionManager.createInteractionHandle();
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// run animation... (`runAfterInteractions` tasks are queued)
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// later, on animation completion:
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InteractionManager.clearInteractionHandle(handle);
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// queued tasks run if all handles were cleared
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```
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