JavaScript is single threaded you will never get a good smooth UI. Maybe in the future there could be more support for a "UI-thread" and background tasks but f

JavaScript is single threaded you will never get a good smooth UI. Maybe in the future there could be more support for a "UI-thread" and background tasks but for now that's how it is. Android UI framework is basically a copy of Java/Swing where you have single UI thread that does all the painting and event handling. As a developer you have two basic rules for making a smooth UI 1) don't block the UI thread -- create background task for IO, heave code, ect... 2) don't call UI framework from non-UI thread.