How to measure/scale text to fit desired width?

I would like to measure the width of a given word or words (not a paragraph) when rendered with a given font and font size. Let's say I have the code below that creates a new document, layer, and text:

var myDoc = app.documents.add(200, 200);


var textLayer = myDoc.artLayers.add();
textLayer.kind = LayerKind.TEXT;

var text = textLayer.textItem;
text.font = "Impact";
text.size = 72;
text.position = Array(100,100);
text.contents = "SUPER";

I want to measure the width of text.

Ultimately I want to resize the text to be a certain width while maintaining its aspect ratio. (The height of the text is not important, just the width, and it should not be distorted.) Knowing the width I could easily calculate the correct font size. If there is a better way to this solution than measuring the width, please let me know.

Thanks!