ImmediatelyFast

Overview

ImmediatelyFast is a free, open-source client mod for Minecraft: Java Edition that improves rendering efficiency. It best suits players on Fabric, Forge, NeoForge, or Quilt whose CPU limits their frame rate; players with very fast CPUs may see less benefit.

Its focus is narrow and useful: it reduces the work involved in drawing game elements and sending them to the GPU. Broad coverage across the game and other mods makes it relevant to varied modpacks, but known incompatibilities can rule it out for some clients.

Key features

• More efficient rendering: A custom buffer batches draw calls and sends data to the GPU more efficiently. This targets CPU-limited rendering, so it is a sensible option when the processor is the constraint, rather than a general fix for every performance problem.
• Coverage across game elements: The mod optimizes entities, block entities, particles, text, GUI and HUD, maps, and immediate-mode rendering from other mods. That breadth can benefit varied scenes and interfaces in a modpack.
• Loader and version support: It supports Fabric, Forge, NeoForge, and Quilt, with compatibility listed for Minecraft 1.18.2 through 1.21.x and versions 26.1.x, 26.2, and 26.3. Check that your specific game version and loader match before adding it.
• Configurable behavior: A config file in the Minecraft instance’s config folder offers options for performance or compatibility. This gives users room to adjust a setup, though it does not make the mod compatible with every client or mod.
• Developer API: API documentation makes the project relevant to mod developers integrating with its rendering work, as well as players choosing performance mods.

Pricing

ImmediatelyFast costs nothing. Its sole plan is the open-source Minecraft client mod, licensed under LGPL-3.0-or-later. There is no paid tier or free trial to weigh; the free release gives players the rendering optimizations without a subscription. It does not require Sodium, but it also does not support dedicated servers.

Platforms

ImmediatelyFast runs on Linux, macOS, and Windows as a client-side mod for Minecraft: Java Edition. It is a multi-loader project supporting Fabric, Forge, NeoForge, and Quilt. It is designed to work with most mods and modpacks, but OptiFabric, OptiFine, LunarClient, and LabyMod are named incompatibilities. Players using any of those should choose another option for that setup.

Who it's for

Choose ImmediatelyFast if your Minecraft Java client is CPU-limited and you want rendering improvements across multiple kinds of game elements and supported loaders. Slower CPUs stand to benefit more than very fast ones. It is a poor fit if the CPU is not your bottleneck, if you need dedicated server support, or if your client depends on one of its known incompatible mods.

Pros and cons

• Pros: Free and open source, with no Sodium requirement; covers several rendering categories, including immediate-mode rendering by other mods; supports four mod loaders.
• Cons: Its gains depend on a CPU rendering bottleneck, so the benefit may be smaller on a very fast CPU; OptiFabric, OptiFine, LunarClient, and LabyMod are known incompatibilities; client-side only, with no dedicated server support.

Alternatives

Lithium is another free, open-source Minecraft mod, with a Fabric and NeoForge plan; consider it when that option better suits your setup.

Exordium is a free client-side Minecraft mod for players comparing another client-side option.

VulkanMod is free and requires Fabric plus a GPU that supports Vulkan 1.2, so choose it if those requirements fit your system.

FerriteCore is a free, MIT-licensed Minecraft Java Edition mod, with self-hosted listed as its platform.

Krypton is a free Minecraft mod under LGPL-3.0-only, with Linux listed as its platform.

Nvidium is free but requires Sodium and an NVIDIA GPU that supports mesh shaders; it suits players who meet both requirements.

Alternate Current is a free, MIT-licensed Minecraft mod.

More Culling is another free option for players comparing Minecraft mods.

For more options, browse Minecraft Performance Mods.

Verdict

ImmediatelyFast is a strong fit for Minecraft Java players whose CPU is holding back rendering and who want broad, free improvements across game elements and supported loaders. Its focused rendering work and lack of a Sodium requirement are compelling; look elsewhere if your CPU is already fast, you need server support, or you rely on an incompatible client or mod.