Is it better to keep apps closed (double tap home button, hold the icon, and exit the app), as much as possible on iOS devices? I know the more apps one has open, the more RAM, for example is used, but would that same principle apply, in measurable effect, to iOS?
For example, would my iPhone (4S in this case), or iPad (3rd Gen) run any faster, or have longer battery life, or do better in any particular way if I had only 5 apps open, versus having 50 open?
Side note: I know there are some apps that don't handle multi-tasking very well (possibly due to a lack of programming expertise?) and hence will deplete battery life while running in the background. I'm not necessarily talking about those.