Comparison file, from http://yal.cc/introducing-openfl-bitfive

Main.hx

package ;

import flash.Lib;
import flash.display.BitmapData;
import flash.display.Bitmap;
import flash.geom.Point;
import flash.geom.Matrix;

class Main {
  var flowSurface:BitmapData;
	var flowBitmap:Bitmap;
	var flowPoint:Point;
	var flowMatrix:Matrix;
	public function new() {
		var flowSource:BitmapData = openfl.Assets.getBitmapData("img/water.png"); // 256x256 PNG
		flowSurface = new BitmapData(768, 768, true, 0);
		flowPoint = new Point();
		for (i in 0 ... 9) {
			flowPoint.x = (i % 3) * 256;
			flowPoint.y = Std.int(i / 3) * 256;
			flowSurface.copyPixels(flowSource, flowSource.rect, flowPoint);
		}
		flowBitmap = new Bitmap(new BitmapData(480, 320, true, 0));
		Lib.current.addChild(flowBitmap);
		flowBitmap.stage.frameRate = 60;
		flowMatrix = new Matrix();
		flowBitmap.addEventListener(flash.events.Event.ENTER_FRAME, onEnterFrame);
		onEnterFrame(null);
	}
	function onEnterFrame(e:Dynamic):Void {
		var t:Float = Lib.getTimer() / 1000;
		#if copyPixels
		flowPoint.x = -((t * 100) % 256);
		flowPoint.y = -((t * 70) % 256);
		flowBitmap.bitmapData.copyPixels(flowSurface, flowSurface.rect, flowPoint);
		#else
		flowMatrix.tx = -((t * 100) % 256);
		flowMatrix.ty = -((t * 70) % 256);
		flowBitmap.bitmapData.draw(flowSurface, flowMatrix);
		#end
	}
	@:keep public static function main()  {
		new Main();
	}
}