Tested Q_rsqrt on Apple M4 (Mac mini) and Zen 3 (Ryzen 5800HS / WSL2). M4's -O2 already rewrites 1/sqrtf to frsqrte and ties Q_rsqrt; x86 clang needs -ffast-math or hits a 12x gap. Hand-written NEON/SSE wrappers turn out slower. Newton 0/1/2 error and the Lomont constant covered too.
Read through the Quandoom paper and QASM source. 72,376 qubits, 80 million gates, 320x200 monochrome output. How reversibility constraints change the game's rendering, why superposition only handles RNG, and why a classical laptop runs it at 10-20 fps.
Design notes for centrally managing 3 play PCs at an exhibition booth. Mix the management UI into HDMI multiview to fit everything on one monitor, with a Stream Deck physical console so a relief operator can take over without breaking anything.
