---
title: "DFast | DonQuaan"
description: "A hardware-aware performance meta-optimizer for Minecraft: detects your machine and tunes the JVM and mod stack with zero config. In beta."
image: "https://donquaan.com/og-hero.png"
url: "https://donquaan.com/en/project/dfast"
lang: "en"
---

[All projects](https://donquaan.com/en/project)

Minecraft Mod · Source-available · 2026 · Beta · known bugs

# DFast

A hardware-aware performance meta-optimizer for Minecraft: detects your machine and tunes the JVM and mod stack with zero config. In beta.

Java 21+ Fabric Loader 0.19.3 Minecraft 1.21.1 Panama FFM Windows

[GitHub source](https://github.com/DonQuaan/DFast) [License and terms](https://github.com/DonQuaan/DFast?tab=License-1-ov-file)

## What DFast does

Install one DFast mod and it detects your hardware, then tunes the JVM and mod stack: three pillars are hardware-based auto-tune, anti-conflict coordination between optimization mods, and a Windows-native micro-layer via Panama FFM. Requirements: Minecraft 1.21.1, Fabric Loader 0.19.3, Java 21 or newer (Java 25 recommended), Fabric API. Install by dropping the .jar from Releases into the mods folder.

DFast is part of the Promethium Optimized source but not all of it; PO itself is closed source. DFast is source-available under PolyForm Noncommercial 1.0.0 plus the DonQuaan addendum (non-commercial only, attribution required, organizations larger than 3 people excluded). The project is still in beta with many known bugs.

License: PolyForm Noncommercial 1.0.0 + DonQuaan Addendum

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