ImmediatelyFast Backport
This project backports ImmediatelyFast to 1.16.5
About this Mod
ImmediatelyFast Backport
ImmediatelyFast Backport brings immediate mode rendering optimizations inspired by ImmediatelyFast to Minecraft 1.16.5 Fabric.
The mod improves rendering performance by batching draw calls and using more efficient buffer handling to reduce CPU overhead during rendering.
Optimizations
This backport aims to improve the performance of:
Entity rendering
Block entity rendering
Particle rendering
Text rendering
GUI/HUD rendering
Rendering used by other mods
It also includes targeted optimizations for certain vanilla rendering paths where possible.
About the Backport
This project adapts many of the rendering optimization concepts used in modern versions of ImmediatelyFast for Minecraft 1.16.5.
Because older Minecraft versions use different rendering internals, some implementations have been rewritten or adjusted specifically for the 1.16.5 rendering engine and Fabric ecosystem.
Not every feature from the original mod may be included, but the goal is to preserve the most useful optimizations while maintaining stability and compatibility on older versions.
Why?
Many players still use older Minecraft versions like 1.16.5, but optimization support for those versions has slowed down over time.
This project exists to help bring modern rendering optimization improvements back to older versions so players and modpacks can continue benefiting from newer performance work.
Available Versions
How to Install ImmediatelyFast Backport on Your Client
Install the Mod Loader Locally
Install fabric for your local Minecraft version.
Download the Matching File
Choose the ImmediatelyFast Backport file for fabric and Minecraft 1.16.5.
Install Mod
Place the .jar file in your local .minecraft/mods folder and restart Minecraft. No server-side installation is required.
Compatibility
Mod Loaders
Minecraft Versions
1.16.5
Server-side
✗ UnsupportedRecommended RAM
4 GB(min. 3 GB)Frequently Asked Questions
Does ImmediatelyFast Backport need to be installed on the Minecraft server?
No. Modrinth marks ImmediatelyFast Backport as unsupported on the server side. Install it only in your local Minecraft mods folder. Your server can remain unchanged unless the mod page lists an additional dependency.
Which version and loader does ImmediatelyFast Backport require?
Use a file for fabric and your exact Minecraft version. Supported versions include 1.16.5. Files for different loaders are not interchangeable.
ImmediatelyFast Backport is not working – what should I check?
First check the Minecraft version, loader version and required dependencies. Put the .jar file in your local .minecraft/mods folder and remove older duplicates. Because this mod is client-side, adding server RAM will not fix it.
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Minecraft Server for Your Group
ImmediatelyFast Backport stays on your client. Host a compatible world for your group.