I benchmarked 30+ TTS engines for a real-time translator on Apple M4. Quantization made things SLOWER. Here's all the data.

I'm building a real-time speech translator (STT → LLM translation → TTS) and spent a couple weeks benchmarking every TTS engine I could find — cloud and local. Running on MacBook Air M4, 24GB RAM. Some findings were... not what I expected. Sharing everything because I couldn't find this data anywher