[hajile]

https://webassembly.org/roadmap/

Atomics have universal support in modern browsers.

This is primarily a single-threaded problem. Each x and y update depends directly on the previous x and y values with the x and y being used to update pixels.

At most (barring changes to the algorithm), it looks like you could calculate these on one thread and update the image on another thread.

[jcl]

It’s true that the problem of generating the exact same image seems to be a single-threaded problem. But I suppose the general problem of rendering an approximation of a strange attractor could be parallelized by generating images from several different starting positions and combining them.