Repro TextField Performance issue.

main.hx

package;

import openfl.Assets;
import openfl.display.Bitmap;
import openfl.display.Sprite;
import openfl.events.KeyboardEvent;
import openfl.Lib;
import openfl.text.Font;
import openfl.text.TextField;
import openfl.text.TextFieldAutoSize;
import openfl.text.TextFormat;
import openfl.text.TextFormatAlign;
import openfl.events.Event;
import openfl.events.MouseEvent;


class Main extends Sprite {
	
	private var demo:Int = 0;
	private static inline var MAX_DEMO:Int = 5;
	
	private var alpha_step:Float = 0.25;
	private var comparison:Bitmap;
	private var label:TextField;
	
	public function new () {
		
		super ();
		var lastY:Float = 0;
		var fieldCount:Int = 0;
		var f = font("nokiafc22.ttf");

		stage.addEventListener (MouseEvent.CLICK, function(e:MouseEvent):Void {
			
			makeText(50, lastY, TextFormatAlign.CENTER, 16, f, true);
			makeText(150, lastY, TextFormatAlign.CENTER, 16, f, true);
			makeText(250, lastY, TextFormatAlign.CENTER, 16, f, true);
			makeText(350, lastY, TextFormatAlign.CENTER, 16, f, true);
			makeText(450, lastY, TextFormatAlign.CENTER, 16, f, true);
			lastY += 10;
			fieldCount += 5;
			trace('text field count: ', fieldCount);
		});
	}
	
	function clear():Void
	{
		while (numChildren > 0)
		{
			removeChild(getChildAt(0));
		}
	}

	function font(str:String):String
	{
		var f = Assets.getFont("assets/"+str);
		if (f != null)
		{
			return f.fontName;
		}
		return str;
	}

	function makeText(X:Float, Y:Float, align, size:Int, ?font:String, ?embed:Bool=false)
	{
		var textField = new TextField();
		textField.embedFonts = embed;
		textField.defaultTextFormat = new TextFormat(font, size, 0x000000, null, null, null, null, null, align, null, null, null, 20);
		
		//textField.selectable = false;
		//textField.border = true;
		//textField.borderColor = 0x000000;
		
		//textField.width = 700;
		//textField.multiline = true;
		//textField.wordWrap = true;
		
		textField.autoSize = TextFieldAutoSize.NONE;
		
		textField.x = X;
		textField.y = Y;
		
		textField.text = "Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.";
		
		addChild (textField);
	}
}