anchor.diff:          UpdateTime: int64
           UpdateAccumulator: int64
           RenderAccumulator: int64
  -        RenderInterval: int64
           RenderFrameCount: int
           RenderFrameCountTime: int64
           RenderFrameLastCount: int }
  
positive.code:               UpdateTime = 0L
                UpdateAccumulator = targetUpdateInterval
                RenderAccumulator = 0L
                RenderInterval = 0L
                RenderFrameCount = 0
                RenderFrameCountTime = 0L
                RenderFrameLastCount = 0 }
  
negative.code:     Native.App.drawVbo (drawLines.Length * sizeof<DrawLine>, drawLines, vbo)
  
  let init () = 
      GCSettings.LatencyMode <- GCLatencyMode.Batch
      Native.App.init ()
  
  let exit app = Native.App.exit app
  