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aninimus

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I recently read a chapter of David Herman's Effective JavaScript[1] that talked about preserving the async contract even if you cache results (ie. can return without an async call from the caller). Try:

    if (connectionInstance) { 
      setTimeout(function(){callback(connectionInstance)}, 0); 
      return;
    }
That way your async functions will always behave the same way.

[1] http://effectivejs.com/

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