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TTS Bench — Speed — 2026-05-31_1357

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 · qwentts_fast — 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): Qwen3-TTS 1.7B (CUDA-graph) (cuda) — 3.66× warm RTFx, 1.57s warm TTFA

Model	Device	TTFA cold	TTFA warm	RTFx cold	RTFx warm	Peak RAM	Peak VRAM	Size	Released
Qwen3-TTS 1.7B (CUDA-graph)	cuda	7.93s	1.57s	0.83×	3.66×	2.61 GB	4.89 GB	1.7B	Jan 2026