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TTS Bench — Speed — 2026-06-15_1416

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

Label: default voice · melotts · prompts 5

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 predefined-voice: MeloTTS (cuda) — 32.96× warm RTFx, 139ms warm TTFA

Fastest cloning-capable: no data

Model	Device	TTFA cold	TTFA warm	RTFx cold	RTFx warm	Peak RAM	Peak VRAM	Size	Released
MeloTTS	cuda	1.71s	139ms	2.69×	32.96×	2.85 GB	800 MB	~52M	Feb 2024
MeloTTS	cpu	1.54s	464ms	2.93×	9.93×	2.31 GB	—	~52M	Feb 2024