An even faster tri fill using stamping. It takes about 5 seconds for it to load all the triangles into ram after that it runs at about 6000 tris/sec (on my fairly powerful computer). If you want to visually see how it works check out my Geogebra applet here: https://www.geogebra.org/m/v6jxhmx7 For instructions on how it works please see inside.
Comparison of triangle filler speeds: On 16gb ram, i7 1.6ghz 8-core computer: This: 6000 tris/sec bobojoeho: 5400 tris/sec https://scratch.mit.edu/projects/484568659/ --Rex--: 5000 tris/sec https://scratch.mit.edu/projects/509029922/ geotale: 4900 tris/sec https://scratch.mit.edu/projects/406665845/ logfather: 4300 tris/sec https://scratch.mit.edu/projects/24828481/ It fills the triangle with only 3 stamps, however for some reason it's not super fast. I think with more optimisations it could reach 10k /sec.