All i can think of.
https://www.dropbox.com/s/it7wlbenq74sd ... .capx?dl=0
Yet, it is not that much faster.
So lets take it in overdrive, there is only one way to know performance, measure.
Mine with to much moving objects.
https://www.dropbox.com/s/o28830v2hzpo7 ... .capx?dl=0
Yours with to much moving objects.
https://www.dropbox.com/s/qee816u14cn18 ... .capx?dl=0
Yes now there is some difference.
Conclusion: You really have to do weird things to bring performance (in a simple game) on its knees.
Or, your solution is not that bad.