My take on the classic benchmark. It produces thousands of individually colored and sized sprites moving at different velocities and rates of rotation, on a simple shader background. Nothing but gdscript (apart from the shader).
<img src="https://i.imgur.com/h9yFkYJ.jpg" width="50%">
https://github.com/duane-r/bunnymark
or if you just want to see it...
https://www.duanerobertson.com/bunny-godot/
Edit: The source has been moved here.