ModsFinder

Bura

by evodev

Players who notice stutter during chunk loading can install Bura, an alpha Fabric mod that targets lag spikes and frame rate stability in singleplayer.

FabricClient required, server optionalMIT License1.21.11

What it does

Bura works on chunk compilation, upload scheduling and visibility culling, the parts of rendering that cause frame drops when new terrain loads. The mod is aimed at singleplayer play, where it reduces lag spikes and smooths out frame rate changes during movement.

Bura is a client mod. Only the client needs it, and a server can run without it. The mod is built for Fabric and targets 1.21.11 only, with the latest file, 0.2.0, published on 2026-04-09 on the alpha channel. Its license is the MIT License, and the code is not open source. Bura was first published on 2026-02-04 and last updated on 2026-04-09.

Key features

  1. Chunk compilation tuning

    Chunk meshes are built with a changed scheduling approach to reduce the spikes that appear when many chunks finish at once.

  2. Upload scheduling

    Uploads of finished chunk data to the GPU are paced so that a burst of new terrain does not stall the frame.

  3. Visibility culling

    Blocks and entities outside the view are skipped earlier, which lowers the work done on each frame.

  4. Lower memory churn

    Heap allocation rate is reduced, which aims to cut the garbage collection stutter that comes from frequent allocations.

Compatibility

Latest build for each game version and loader.

No stable releases
Every published file is a beta or alpha build.
1.21.110.2.0
ReleaseBetaAlphaNot available

Only full game releases are shown. This mod publishes no snapshot builds.

Use cases

Fast movement through new terrain

Players who travel quickly and load many chunks at once can see fewer hitches as the world streams in.

Singleplayer on modest hardware

Players running a single-player world on a machine with a limited frame budget can test whether the smoother pacing helps.

Who it’s for: Players on Fabric 1.21.11 who play singleplayer and want fewer lag spikes and steadier frame rates. Players who accept an alpha build and occasional rendering quirks will get the most out of it.

How it compares

Full comparison

Smoothgl is a client-side only Fabric mod for 1.21.4 – 1.21.11, open source under the GNU Lesser General Public License v3.0 or later. Lazy Chunks is also client-side only and open source, under the GNU Lesser General Public License v3.0 only, for 1.21 – 1.21.4. Bura is distributed under the MIT License, is not open source, and covers 1.21.11 only.

ModLoadersGame versionsEnvironmentUpdated
BuraFabric1.21.11Client required, server optional2026-04-09
SmoothglFabric1.21.4 – 1.21.11Client-side only2026-06-05
Lazy ChunksFabric1.21 – 1.21.4Client-side only2025-12-29

Questions

Does Bura need Fabric API?

No required dependency is listed for Fabric. Check the file page before installing.

Must the server run Bura too?

No. Players need it in their own game, while a server can run without it.

Is Bura safe to use on a stable world?

The mod is an alpha build, and its behavior may change between versions. The author notes that aggressive culling may cause occasional chunk flicker or ghosting.

In the catalog

Bura is one of 3,545 Optimization mods on ModsFinder, and one of 2,575 Optimization mods for Fabric. 19,862 mods support Minecraft 1.21.11.

Optimization mods3,545Fabric modsMods for 1.21.1119,862

Similar mods

Sodium1.16.3 – 26.3Iris Shaders1.16.5 – 26.3Entity Cullingb1.7.3 – 26.3FerriteCore1.16.5 – 26.3ImmediatelyFast1.18.2 – 26.3Sodium Extra1.16.2 – 26.3

What the author says

Tested combinations: - Sodium - Iris - ImmediatelyFast - Entity Culling - Lithium - FerriteCore
evodev, on the Modrinth page

Official listing

Owner
evodev
Published
2026-02-04
Updated on Modrinth
2026-04-09
Facts verified
2026-10-15

Tags

OptimizationWorld generation
Open on ModrinthCompare