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POIs it faster to set a reference to a local variable of a nested object in ActionScript or the same?
 

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  1. POIs it faster to set a reference to a local variable of a nested object in ActionScript or the same?
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    <p>I have an object that is nested several levels deep which I'm referencing multiple times. Is it faster to create and set a reference to that object or does it matter? </p> <p>Context I heard that it is faster to create a local reference. This is years ago and for a Visual Basic project. But this is Flash. And the output is a SWF / bytecode. And the compiler could look at that reference and do what I'm doing so that the object does not have to be looked up each time. </p> <p>For example:</p> <pre><code>public function doStuff():void { Model.instance.view1.button1 = button1; Model.instance.view1.button2 = button2; Model.instance.view1.button3 = button3; Model.instance.view1.button4 = button4; Model.instance.view1.button5 = button5; Model.instance.view1.button6 = button6; // more fake code referencing more something.something.something like things for (var i:int;i&lt;something.something.something.length;i++) { var result:Object = Controller.staticMethod(button1); var result2:Object = Controller.staticMethod(button1); } } </code></pre> <p>Vs:</p> <pre><code>public function doStuff():void { var view1:View = Model.instance.view1; view1.button1 = button1; view1.button2 = button2; view1.button3 = button3; view1.button4 = button4; view1.button5 = button5; view1.button6 = button6; } </code></pre> <p>.<br> Taking Baris suggestion I tested it for myself. Below are the results (though I don't know how to interpret them into the actual difference ie 'method 1 is .000001 faster than method 2').</p> <p><strong>Results</strong></p> <p>Test 1</p> <pre><code> var instance:Model = Model.instance; var startTime:int = getTimer(); for(var i:int = 0; i&lt;10000000; i++){ instance.url = ""; } trace(getTimer()-startTime); // 826, 929, 823 var startTime:int = getTimer(); for(var i:int = 0; i&lt;10000000; i++){ Model.instance.url = ""; } trace(getTimer()-startTime); // 3483, 3976, 3539 </code></pre> <p>Test 2</p> <pre><code> var instance:Model = Model.instance; var localLogo:BitmapImage = Model.instance.logo; var startTime:int = getTimer(); for(var i:int = 0; i&lt;10000000; i++){ localLogo = logo; } trace(getTimer()-startTime); // 2070, 2083, 2110 var startTime:int = getTimer(); for(var i:int = 0; i&lt;10000000; i++){ instance.logo = logo; } trace(getTimer()-startTime); // 2028, 2509, 2154 </code></pre>
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