actionscript 3 - How to convert Flash game to use BitmapData? -

currently have flash as3 game doesn't use bitmapdata techniques. however, due performance reasons, i'd implement it.

i cannot find single comprehensive tutorial using bitmap , bitmapdata classes game.

essentially have world class acts game "world" container holds game objects (players, items, etc). within world enter_frame event ticks each object:

private function framehandler(e:event):void {      if (!ispaused) {          (i = 0; < characters.length; ++) {              characters[i].tick();         }          (i = 0; < controllers.length; ++) {              controllers[i].tick();         }          //etc...      }  } 

how can implement bitmapdata system?

edit

currently of world objects using highly detailed vector graphics cause performance suffer when there many on stage. why i'm turning bitmaps.