[infogulch]

I've always wondered how those "Ten minute Mandelbrot zoom" videos worked, because there's no way double would last that long at a tolerable zoom rate.

The perturbation technique is interesting. Calculating just a few points with super high precision and then filling the pixels in between by adding an offset and continuing with lower precision halfway though the calculation seems plausible at a glance, but I'll have to read that more carefully later.

Thanks for sharing!