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TTS Bench — Speed — 2026-05-31_0034

Rig: windows-5090 — AMD Ryzen 9 9950X3D 16-Core Processor (16C) · NVIDIA GeForce RTX 5090 32GB · 126 GB RAM · Windows 11

Label: openvoice wav-persist refix (cloning) — ref chris_hemsworth_15s.wav

TTFA = time to first audio (ms; lower is better). RTFx = realtime speed (× realtime; higher is better; e.g. 10× means 10 sec of audio generated per 1 sec of compute). Cold = first run after process start; warm = subsequent runs.

Speed winners

Fastest (this cloning run): OpenVoice v2 (cuda) — 19.25× warm RTFx, 315ms warm TTFA

Model	Device	TTFA cold	TTFA warm	RTFx cold	RTFx warm	Peak RAM	Peak VRAM	Size	Released
OpenVoice v2	cuda	1.48s	315ms	4.19×	19.25×	—	1.35 GB	~100M	Apr 2024
OpenVoice v2	cpu	2.22s	1.26s	2.61×	4.81×	—	—	~100M	Apr 2024