Comments on: AVM2 Performance – Sprite Alpha vs. Fill Alpha

By: Rigard

Rigard — Sat, 17 Oct 2009 10:05:47 +0000

Well doing something along these lines and changing the values of the fill and the sprite alpha didn't give me a significant time difference between the two.

[code]
var time:Number = getTimer();
trace(time);

for (var i:uint = 0; i < 1000; i++) {
var spr:Sprite = new Sprite();
spr.graphics.beginFill(0x000000, .5);
spr.graphics.drawRect(0, 0, 100, 100);
spr.graphics.endFill();
//spr.alpha = 1;
addChild(spr);
}

time = getTimer();
trace(time);
[/code]

You got some other kind of rendering in mind - over bitmaps or something like that? Or maybe while they're moving. I don't think it makes much difference.

By: Rigard

Rigard — Fri, 14 Mar 2008 12:35:17 +0000

Well doing something along these lines and changing the values of the fill and the sprite alpha didn’t give me a significant time difference between the two.

[code]
var time:Number = getTimer();
trace(time);

for (var i:uint = 0; i < 1000; i++) {
var spr:Sprite = new Sprite();
spr.graphics.beginFill(0x000000, .5);
spr.graphics.drawRect(0, 0, 100, 100);
spr.graphics.endFill();
//spr.alpha = 1;
addChild(spr);
}

time = getTimer();
trace(time);
[/code]

You got some other kind of rendering in mind – over bitmaps or something like that? Or maybe while they’re moving. I don’t think it makes much difference.