30十二/093
蛋疼的性能优化
程序代码来之Advanced ActionScript Animation。 下面这个是没有优化过的
package { import flash.display.Sprite; import flash.display.StageAlign; import flash.display.StageScaleMode; import flash.events.Event; import flash.text.TextField; import flash.text.TextFormat; [SWF(width=800, height=800, backgroundColor=0xffffff)] public class Container3D extends Sprite { private var _sprite:Sprite; private var _n:Number = 0; public function Container3D() { stage.align = StageAlign.TOP_LEFT; stage.scaleMode = StageScaleMode.NO_SCALE; _sprite = new Sprite(); _sprite.y = stage.stageHeight / 2; for(var i:int = 0; i < 100; i++) { var tf:TextField = new TextField(); tf.defaultTextFormat = new TextFormat("Arial", 40); tf.text = String.fromCharCode(65 + Math.floor(Math.random() * 25)); tf.selectable = false; tf.x = Math.random() * 300 - 150; tf.y = Math.random() * 300 - 150; tf.z = Math.random() * 1000; _sprite.addChild(tf); } addChild(_sprite); addEventListener(Event.ENTER_FRAME, onEnterFrame); } private function onEnterFrame(event:Event):void { _sprite.x = stage.stageWidth / 2 + Math.cos(_n) * 200; _n += .05; } } } |
加了行 cacheBitmap = true 后，少了20%这样
package { import flash.display.Sprite; import flash.display.StageAlign; import flash.display.StageScaleMode; import flash.events.Event; import flash.text.TextField; import flash.text.TextFormat; [SWF(width=800, height=800, backgroundColor=0xffffff)] public class Container3D extends Sprite { private var _sprite:Sprite; private var _n:Number = 0; public function Container3D() { stage.align = StageAlign.TOP_LEFT; stage.scaleMode = StageScaleMode.NO_SCALE; _sprite = new Sprite(); _sprite.y = stage.stageHeight / 2; _sprite.cacheAsBitmap = true; for(var i:int = 0; i < 100; i++) { var tf:TextField = new TextField(); tf.defaultTextFormat = new TextFormat("Arial", 40); tf.text = String.fromCharCode(65 + Math.floor(Math.random() * 25)); tf.selectable = false; tf.x = Math.random() * 300 - 150; tf.y = Math.random() * 300 - 150; tf.z = Math.random() * 1000; _sprite.addChild(tf); } addChild(_sprite); addEventListener(Event.ENTER_FRAME, onEnterFrame); } private function onEnterFrame(event:Event):void { _sprite.x = stage.stageWidth / 2 + Math.cos(_n) * 200; _n += .05; } } } |
把所有的字母都draw成bitmap以后再加去显示对象里面,cpu 占用率奇迹般地只有10%了..
而且我发现，关掉鼠标事件很有必要...
package { import flash.display.Bitmap; import flash.display.BitmapData; import flash.display.Sprite; import flash.display.StageAlign; import flash.display.StageScaleMode; import flash.events.Event; import flash.text.TextField; import flash.text.TextFormat; [SWF(width=800, height=800, backgroundColor=0xffffff)] public class Container3D extends Sprite { private var _sprite:Sprite; private var _n:Number = 0; public function Container3D() { stage.align = StageAlign.TOP_LEFT; stage.scaleMode = StageScaleMode.NO_SCALE; _sprite = new Sprite(); _sprite.y = stage.stageHeight / 2; _sprite.cacheAsBitmap = true; _sprite.mouseChildren = false; _sprite.mouseEnabled = false; for(var i:int = 0; i < 100; i++) { var tf:TextField = new TextField(); tf.defaultTextFormat = new TextFormat("Arial", 40); tf.text = String.fromCharCode(65 + Math.floor(Math.random() * 25)); tf.selectable = false; tf.width = tf.textWidth; tf.height = tf.textHeight; var bdd:BitmapData = new BitmapData(tf.width, tf.height, true, 0xFFFFFF); bdd.draw(tf); var bd:Bitmap = new Bitmap(bdd); bd.x = Math.random() * 300 - 150; bd.y = Math.random() * 300 - 150; bd.z = Math.random() * 1000; _sprite.addChild(bd); } addChild(_sprite); addEventListener(Event.ENTER_FRAME, onEnterFrame); } private function onEnterFrame(event:Event):void { _sprite.x = stage.stageWidth / 2 + Math.cos(_n) * 200; _n += .05; } } } |
2009年12月31日 16:10
优化真让人蛋疼。
2010年01月08日 16:45
换成这种 内存使用情况怎么样？
2010年01月28日 10:28
这个不是奇迹，，，，，矢量换成位图CPU下降再正常不过了。。。。