I Made Zig Compute 33 Million Satellite Positions in 3 Seconds. No GPU Required.I've spent the past month optimizing SGP4 propagation and ended up with something interesting: astroz is now the fastest general purpose SGP4 implementation I'm aware of, hitting 11-13M propagations per second in native Zig and ~7M/s through Python with just pip install astroz. This post breaks down how I got there. A note on "general purpose": heyoka.py can be faster for batch-processing many sat
