Speed up immediate mode rendering in Minecraft
ImmediatelyFast
ImmediatelyFast is an open source Minecraft mod which improves the immediate mode rendering performance of the client.
It is designed to be lightweight and compatible with other mods.
Optimizations
ImmediatelyFast generally optimizes all immediate mode rendering by using a custom buffer implementation which batches draw calls and uploads data to the GPU in a more efficient way.
The following parts of the immediate mode rendering code are optimized:
Entities
Block entities
Particles
Text rendering
GUI/HUD
Immediate mode rendering of other mods
It also features targeted optimizations where vanilla rendering code is being changed in order to run faster.
The following parts of the rendering code are optimized with a more efficient implementation:
Map rendering
HUD rendering
Text rendering
Performance
Here are some performance comparisons of areas the mod optimizes particularly well:
If other mods are listed in the table this means that this mod also optimizes that part of the game.
Test Hardware: Ryzen 5 1600, 32GB DDR4, GTX 1060
FPS Numbers were taken from external tools (in this case MSI Afterburner) and averaged over a couple of seconds.
If you decide to test this yourself keep in mind that ImmediatelyFast can only improve FPS in a scenario where your CPU is the bottleneck (Most likely the case if your GPU isn't ancient or you use very heavy shaders). Slower CPUs will benefit more from this mod than really fast CPUs.
Entity Rendering
Generally FPS should be around 2x higher on busy servers. [Tested using IF 1.1.7 on 1.19.3]
Tested on a spigot server with 1000 cows in a 3x3 box on screen.
Map Rendering
Generally FPS should be around 5x higher when there are many maps on screen. [Tested using IF 1.1.1 on 1.19.3]
Tested on a fabric server with the Image2Map mod and around 930 maps on screen.
HUD Rendering
Generally FPS should be around 40% higher in almost all scenarios. [Tested using IF 1.1.7 on 1.19.3]
Tested on a spigot server with different HUD elements on screen (Scoreboard, Potion effect overlay, Bossbars, Filled Chat, Extra hearts, Full Hotbar).
Other mods Without ImmediatelyFast With ImmediatelyFast Improvement
None 250 FPS 380 FPS 1.52x
Sodium 335 FPS 630 FPS 1.88x
Exordium and Sodium 740 FPS 840 FPS 1.14x
Text Rendering
Generally FPS should be around 2x higher when there are many signs or holograms around you. [Tested using IF 1.1.7 on 1.19.3]
Tested on a spigot server with 200 signs (Filled with text) on screen.
Other mods Without ImmediatelyFast With ImmediatelyFast Improvement
None 70 FPS 125 FPS 1.79x
Sodium 110 FPS 300 FPS 2.73x
Block-Entity Rendering
Generally FPS should be around 20% higher when there are many block entities around you. [Tested using IF 1.1.7 on 1.19.3]
Tested on a spigot server with 400 chests on screen.
Other mods Without ImmediatelyFast With ImmediatelyFast Improvement
None 170 FPS 205 FPS 1.20x
Sodium 315 FPS 410 FPS 1.30x
Compatibility
ImmediatelyFast is structured to interfere with mods as little as possible. It should work fine with most if not all mods and modpacks.
Known incompatibilities:
OptiFabric / OptiFine
If you encounter any issues, please report them on the Issue Tracker.
Developer API
You can read the latest version of the API docs here.
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