Afterburner
An all-in-one performance mod that makes Minecraft run smoother and faster by optimizing everything from chunk rendering to world simulation.
Far terrain: 1024 chunks
16 chunks of full terrain plus 1024 chunks of far terrain, seen from Y 2291, at 1102 FPS. Forge 26.3, Afterburner 0.2.5, RTX 5070 Ti, i7-14700F, 3440x1440, FPS uncapped. Far terrain is experimental and off by default.
1010 FPS at 32 chunks
Forge 26.3, Afterburner 0.2.5, all 32 chunks loaded, standing in a badlands canyon. RTX 5070 Ti, i7-14700F, 3440x1440, FPS uncapped.
Chunk Test on Iris Igpu
Render Distance: 2 LoD (Far Terrain): 256 Shaders: Complementary Low Fps: 50-55 avg
Chunk Test on Rx 9060xt
Render Distance: 16 LoD (Far Terrain): 512 Shaders: Complementary High Fps: 250-260 avg
Afterburner 0.2.4, measured
Server tick time, vanilla vs Afterburner on Fabric 26.3 (median of 6 runs), and garbage while exploring, 0.2.2 vs 0.2.4.
Frame rate: Afterburner off vs on (Intel UHD, 3 runs each)
Minecraft 26.3 client on integrated Intel UHD Graphics, render distance 16, camera flying over generated terrain. Three interleaved runs per setting: average FPS about 138 off and 279 on, 1% lows about 60 and 126. Results depend on hardware, settings and the scene.
How Afterburner is built
Overview of one Afterburner build: the client renderer and memory work, the server algorithms, the optional chunk link for slow connections, and the switch that turns each optimization off.
Chunk rendering pipeline
How chunks are built off-thread and drawn: region batching, 16-byte vertices, face grouping, occlusion tests and the entity and section culling they feed.
Smaller chunks on slow connections
Chunk link between a Forge 26.3 server and a Fabric 26.3 client: chunks matched from the player's own disk on a rejoin, and bytes per chunk. One test world.
Dropped items: CPU in the item tick (0.2.0 vs 0.2.1)
Forge 26.3 server with 1,600 resting items, three interleaved runs of 0.2.0 and 0.2.1 on a laptop. Lower is better. A server with few resting items will see little difference.