Comments on: Inlining Math Functions

By: jackson

jackson — Mon, 16 Nov 2009 23:00:14 +0000

You’re right that I’ve already tested that in my article on function performance. The static calls would add some time to it. If you were going to use a lot of math functions all in one place you might use non-static versions like this:

// Generate sin and cos tables (for example)
var sin:Dictionary = new Dictionary();
var cos:Dictionary = new Dictionary();
var math:JMath = JMath.instance;
for (var angle:Number = 0; angle < 360; angle += 0.01)
{
    sin[angle] = math.sin(angle);
    cos[angle] = math.cos(angle);
}

The cost of the local variable and the static instance getter are easily offset by the large number of static math calls you’d save. It’s pretty clean too.

By: Og2t

Og2t — Mon, 16 Nov 2009 22:52:19 +0000

Very interesting Jackson, I am thinking of replacing Math class with JMath now :) Would you think the static method call will add a lot of microtime to the results? I think you’ve done some tests for that before?

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