ImmediatelyFast Reforged (Unofficial): What It Did & Why It Closed
If you build Forge modpacks and chase every frame, you may have stumbled upon ImmediatelyFast Reforged (Unofficial). This client-side mod was a discontinued, unofficial port of the popular Fabric rendering optimizer ImmediatelyFast. It aimed to smooth out performance on heavily modded Minecraft instances by tackling immediate-mode rendering bottlenecks. Today, the official ImmediatelyFast supports Forge natively, making this port a historical curiosity rather than an active tool. However, understanding its role helps modpack authors make informed choices about rendering optimizations.
What the Mod Actually Did
ImmediatelyFast Reforged (Unofficial) for Minecraft focused on a specific pain point: the immediate-mode rendering pipeline. In vanilla Minecraft, the game frequently sends many small draw calls to the GPU for entities, particles, GUI elements, and text. On complex maps or in modpacks with hundreds of entities, this can cause frame drops. The mod introduced a buffering layer that batched these draw calls, reducing CPU overhead and delivering more consistent FPS. It was not a magic “double your FPS” button, but a targeted fix for scenarios where rendering logic, not raw hardware, was the bottleneck.
Key areas accelerated included:
- Entities and block entities (mobs, decorative blocks, machines)
- Particle effects (fire, potions, biome ambiance)
- Text rendering (signs, nameplates, overlays)
- GUI and HUD elements (hotbar, minimaps, status indicators)
Additionally, the mod could improve performance of other mods that relied on immediate-mode rendering, such as Immersive Portals. It also replaced some vanilla rendering code paths with faster implementations, particularly for maps and the HUD.
Forge Compatibility and Version Support
This unofficial port was built exclusively for Forge, adapting the original Fabric mod’s mixins to Forge’s SRG mappings. The author maintained a strict version policy: only the two latest major Minecraft branches at the time received support. In practice, that