Indicator, I don't understand why you repeat the erroneous "launching
another app". Correct me if I'm wrong, when you tap an icon on the
home screen what's happening is that an intent is being sent which
starts an activity in a particular package. That package's application
context may already be "launched" (such as if an activity in it was
recently used), in which case there's no need to either create a new
process for it, nor to reload the package into a process. "Launching"
an activity only occurs if the Andorid system has garbage collected it
or if it was force closed.

This can be easily demonstrated with the Maps application. The first
time, the tiles take a while to load, subsequently, they are displayed
immediately when bringing it to foreground. After a force close, the
tiles again take a while to load.

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