Posted by gouessej on Mar 12, 2020; 3:30pm
URL: https://forum.jogamp.org/Re-Offscreen-rendering-performance-issue-tp4040432p4040437.html

By the way, rewriting all your rendering code with JOGL would help you to get rid of the overlay and Java2D. Maybe this project can help you:
https://github.com/brandonborkholder/glg2d