ImmediatelyFast vs Lithium
ImmediatelyFast
github.comLithium
github.comSide by side
| Figure | ImmediatelyFast | Lithium |
|---|---|---|
| Price from | Free | Free |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | Yes | — |
| Windows | Yes | Yes |
| macOS | Yes | Yes |
| Linux | Yes | Yes |
| API | Yes | — |
| Plans published | 1 | 2 |
| Spec score · Minecraft Performance Mods | 8.6 (#1) | 7.9 (#6) |
| Compatibility | The project is designed to interfere minimally with other mods and modpacks. | The project describes Lithium as compatible with most other mods and suitable for complex gameplay while preserving vanilla behavior. |
| Configuration | Configuration is stored in the Minecraft instance config folder and includes atlas, batching, text lookup and framebuffer options. | No additional configuration is needed after installation, and stable optimizations are enabled by default. |
| License | The project is licensed under LGPL-3.0-or-later. | Lithium is licensed under GNU LGPLv3. |
| Mod loaders | The listing names Fabric, Forge, NeoForge, and Quilt as supported platforms. | The project’s GitHub page lists Fabric and NeoForge support; Modrinth also lists Quilt. |
| Support | The project directs users to report issues through its GitHub issue tracker and links to a Discord server. | The project points users to GitHub issues for problems and its Discord community for installation help and technical support. |
Plans
In their own words
ImmediatelyFast
ImmediatelyFast is a free, open source Minecraft mod that improves client-side rendering performance in Minecraft: Java Edition. It batches draw calls using a custom buffer and sends data to the GPU more efficiently. Its optimizations cover entities, block entities, particles, text, GUI and HUD, maps, and immediate mode rendering used by other mods. The project supports Fabric, Forge, NeoForge, and Quilt, with compatibility listed for Minecraft versions 1.18.2 through 1.21.x and versions 26.1.x, 26.2, and 26.3. It is designed to work with most mods and modpacks, but names OptiFabric, OptiFine, LunarClient, and LabyMod as incompatibilities. The project says it can improve FPS when the CPU is the bottleneck, with slower CPUs benefiting more than very fast ones. A configuration file in the Minecraft instance’s config folder offers performance or compatibility options. The mod is licensed under LGPL-3.0-or-later, and developers can consult API documentation. The project links to a GitHub issue tracker and Discord server for support.
Lithium
Lithium is a free Minecraft mod that optimizes game systems to improve performance. Its work covers physics, mob AI, block ticking, world generation, chunk loading, explosions and redstone wire calculations. It runs on both client and server, but does not need to be installed on both sides. The project says it does not alter game mechanics or visuals and is compatible with most other mods. Lithium supports Fabric and NeoForge. Stable optimizations are active after installation without extra configuration; players can disable individual patches to address bugs or mod compatibility issues, though changes take effect only after restarting the game. The project directs downloads through Modrinth or CurseForge. For multiplayer server administrators, it says improved tick times can let hardware support more loaded entities, chunks and players. In single-player, it optimizes Minecraft’s internal server and may free processor capacity for frame rates and responsiveness. Automated bleeding-edge builds may include unfinished code, bugs or crashes, and are intended for people comfortable debugging software.