Interactive demo of using Newton's method in the complex plane with a cubic. Its a little slow, any ideas for improvements are welcome:
d.umn.edu/~mhampton/NewtCubicA

@hamptonio I made it roughly 2x faster (in Firefox 62 on Debian Buster) by avoiding memory allocation by [...] inside the loop: mathr.co.uk/tmp/Newton%27s%20m

here's one of my experiments from 2012 with GLSL fragment shader (using desktop OpenGL, not WebGL)
archive.org/details/ClaudiusMa I think it ran in realtime, but it's so long ago that I forgot...

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