A ray tracer written in Brainfuck, made by compiling Ray Tracing in One Weekend's C code into Brainfuck using a simple IR. The accompanying blog can be found here.
Brainjoin lets this ray tracer run without taking days, and the binary is left here with a speedup of more than 216,000× over the base running at 40s. A copy at ./bf
There is also another compiler from Daniel Angell's blog post, which reports a 9,000× speedup over his existing base running at 80s.
Both runtime in Intel Core Ultra 9 185H.
Brainfuck render:
compared to the C render:

