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TTS Bench — Speed — 2026-06-02_2108

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

Label: cloning · chris_hemsworth_15s · miratts — 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): MiraTTS (cuda) — 7.01× warm RTFx, 1.46s warm TTFA

Model	Device	TTFA cold	TTFA warm	RTFx cold	RTFx warm	Peak RAM	Peak VRAM	Size	Released
MiraTTS	cuda	2.14s	1.46s	4.76×	7.01×	3.58 GB	1.28 GB	0.5B	Dec 2025