How Redis Creator Built a Metal‑Only Engine to Run DeepSeek V4 Flash at Full Speed on Mac
The ds4.c project, authored by Redis founder Salvatore Sanfilippo, is a Metal‑only C inference engine that uses asymmetric 2‑bit quantization, disk‑based KV caching, and OpenAI/Anthropic‑compatible APIs to achieve usable performance for DeepSeek V4 Flash on high‑end Apple Silicon Macs.
