Using workers for concurrency
Flash Player 11.4 and later, Adobe AIR 13.4
and later for desktop platforms
ActionScript workers make it possible to execute code concurrently,
or in other words, to execute code in the background without interrupting
the main code’s execution.
The ActionScript concurrency apis are available on desktop platforms
only in Flash Player 11.4 and later, and AIR 3.4 and later. Concurrency
is not supported in AIR for mobile platforms.