Haxe example comparing flash.display.Bitmap and starling.display.Image haxe -cp src -lib starling -swf F:/_dev/StarlingTest/bin/StarlingTest.swf -swf-header 800:600:30:FFFFFF -swf-version 11.4 -main Main -swf-lib starling.swf -D as3_native

Main.hx

package ;

import flash.display.Bitmap;
import flash.display.BitmapData;
import flash.display.PixelSnapping;
import flash.display.StageAlign;
import flash.display.StageScaleMode;
import flash.events.Event;
import flash.Lib;
import starling.display.Image;
import starling.display.Sprite;
import starling.display.Button;
import starling.text.TextField;

/**
 * ...
 * @author Jonas Nyström
 */

@:bitmap("bin/test.png") class TestBitmap extends flash.display.BitmapData { }

class Main extends Sprite
{  
	static function main() 
	{
		var stage = Lib.current.stage;
		stage.scaleMode = StageScaleMode.NO_SCALE;
		stage.align = StageAlign.TOP_LEFT;
		// entry point
        
		try {
            var s = new starling.core.Starling(Main, flash.Lib.current.stage);
            s.start();
        }
        catch(e:Dynamic){
            trace(e);
        }
	}

    public function new() {		
        super();
		var testBitmap = new TestBitmap(1412, 2000);
		
		//-----------------------------------
		// Using flash standard API:
		//var img = new flash.display.Bitmap(testBitmap, PixelSnapping.AUTO, true);
		//Lib.current.addChild(img);
		
		//-----------------------------------
		// Using starling
		var img = starling.display.Image.fromBitmap(new Bitmap(testBitmap, PixelSnapping.AUTO, true));
		addChild(img);
		
		//-----------------------------------
		// Benchmarking
		showExecTime("scroll timer", function(){
			for (i in 0...1000) {
				for (v in -1000...1000) {
					img.x = v;			
				}
				img.x = 0;
				
				for (v in -1000...1000) {
					img.y = v;			
				}
				img.y = 0;
			}
		});		
		showExecTime("zoom timer", function() {
			var w = 1412.0;
			var h = 2000.0;
			
			for (i in 0...3000) {
				for (z in 1...100) {
					img.width = w * (z / 100);
					img.height = h * (z / 100);
				}
			}
		img.width = w * (30 / 100);
		img.height = h * (30 / 100);				
		});
		
	
    }	
	
  static function measureExecTime(func): Float{
    var start_time : Date = Date.now();
    func();
    var end_time : Date = Date.now();
    return (end_time.getTime() - start_time.getTime());
  }

  static function showExecTime(explain:String, func): Void {
    var time = measureExecTime(func);
    trace(explain + " : " + time + "ms");
  }	

}