title: Timers and threading in Flex 3 ActionScript
body: <p>Flex 3 ActionScript does not support programmer threads. </p>
  
  <p>But what does <em>flash.utils.Timer</em> do? Does it run in a separate thread or the main loop? If the latter, does that mean that the Timer might not be called if the main loop is in a long-running action?</p>
  
  <p>More generally, what can you tell me about threads running in ActionScript? My once-a-minute Timer <em>is</em> called if an event-handler runs for minutes, so it is not the case that <em>all</em> ActionScript runs in one thread.</p>