Hey folks, while skimming through some posts on Reddit’s r/openscad, I noticed someone mention that there’s a relatively new feature in the more recent development releases called “manifold”. If you check this box, it will dramatically speed up the F6 render time. Not only does it use a more efficient library, it also makes use of multiple cores/threads on your machine to split up the work. The render time is so fast on my models now (though they tend to be fairly simple), just a few hundred milliseconds.
To find this option, navigate to: Edit->Preferences->Features->manifold