ImmediatelyFast guide for All the Mods 10 1.7 to 2.11

Same as in the All the Mods 10 8.1 guide

ImmediatelyFast is an open source, client-side performance mod. It speeds up immediate mode rendering, and it's built to be lightweight and play nicely with other mods. It adds no gameplay of its own. You install it and get smoother FPS.^[1]

In this pack you get the NeoForge build 1.6.13+1.21.1. It has been in the pack since All the Mods 10 2.25 or earlier.^[2]

What it speeds up

It swaps in a custom buffer implementation that batches draw calls and uploads data to the GPU more efficiently. That generally covers these areas:^[1]

• Entities and block entities^[1]
• Particles^[1]
• Text rendering^[1]
• GUI and HUD^[1]
• Immediate mode rendering from other mods^[1]

It also replaces some vanilla code with faster versions for map rendering, HUD rendering and text rendering.^[1]

Who it helps

Anyone whose CPU is the bottleneck. The mod's author says it can only raise FPS in that situation, and that slower CPUs benefit more than very fast ones. You'll notice it most around lots of entities, many maps, or many signs.^[1]

The author's own test with 1000 cows on screen went from 16 FPS to 60 FPS. Those numbers came from a Ryzen 5 1600 with a GTX 1060, on Minecraft 1.19.3 with an older version of the mod. Treat them as an example of the effect, not a promise for this pack.^[1]

Config and compatibility

The mod has a config file in your instance's config folder. The author recommends leaving most options at their defaults. If HUD elements act strangely, the author suggests turning off the hud_batching option. The values this pack ships for these options aren't shown in the sources.^[1]

The author lists OptiFabric and OptiFine as known incompatibilities, along with most closed source clients such as LunarClient and LabyMod.^[1]

Unverified The sources don't show where this mod fits in the pack's progression. They don't show it on the ATM Star path, and they don't show any quests, items or recipes tied to it.

Same as in the All the Mods 10 8.1 guide

Good news: there's nothing to craft or set up first. ImmediatelyFast is a rendering optimization mod. It improves the immediate mode rendering performance of the client and is designed to be lightweight and compatible with other mods.^[1]

Unverified I couldn't confirm any items, recipes or quests for this mod in this pack, so there is no crafting order to follow and no recipe blocks to show.

What it speeds up

The mod uses a custom buffer implementation that batches draw calls and uploads data to the GPU more efficiently. That applies to these areas:^[1]

• Entities and block entities^[1]
• Particles^[1]
• Text rendering^[1]
• The GUI and HUD^[1]
• Immediate mode rendering from other mods^[1]

It also replaces some vanilla code with faster versions, specifically for map rendering, HUD rendering and text rendering.^[1]

What to expect

The mod only helps when your CPU is the bottleneck. That is most likely the case unless your GPU is ancient or you run very heavy shaders. Slower CPUs benefit more than really fast ones.^[1]

The mod's author reports the biggest gains in busy scenes: roughly 2x higher FPS with many entities or many signs around you, and roughly 5x higher with many maps on screen. Those figures were measured with older mod versions on Minecraft 1.19.3, not in this pack, so treat them as a rough guide to where the mod helps rather than what you'll see here.^[1]

ImmediatelyFast doesn't have machines, multiblocks, power or pipes. It's an open source performance mod that works entirely on the rendering side of your client. Its job is to make immediate mode rendering faster. That's the part of the game that draws things like mobs, chests, particles, text and your HUD every frame. It's designed to be lightweight and to play nicely with other mods.^[1]

How the batching works

The core trick is a custom buffer implementation. Normally the game sends many small draw calls. ImmediatelyFast batches those draw calls together and uploads data to your GPU more efficiently. This applies to immediate mode rendering in general, so it helps a whole range of things at once.^[1]

• Entities, such as mobs and animals.^[1]
• Block entities, such as chests.^[1]
• Particles.^[1]
• Text rendering.^[1]
• The GUI and HUD.^[1]
• Immediate mode rendering done by other mods, so modded blocks and entities can benefit too.^[1]

Targeted optimizations

On top of the general batching, ImmediatelyFast changes some vanilla rendering code to use a more efficient implementation. According to the mod page, these targeted changes cover three areas: map rendering, HUD rendering and text rendering. If you have a wall full of maps or a busy HUD, these are the parts doing the heavy lifting.^[1]

When you'll actually notice it

ImmediatelyFast can only raise your FPS when your CPU is the bottleneck. The mod page says this is most likely the case unless your GPU is very old or you run very heavy shaders. Slower CPUs benefit more than really fast ones. If you already have plenty of CPU headroom, you may not see much change.^[1]

The mod page's own benchmarks show the biggest gains in scenes packed with entities, maps, signs or HUD elements. For example, it expects around 2x higher FPS on busy servers with lots of entities and around 5x higher when many maps are on screen. Keep in mind that these tests were run on ImmediatelyFast 1.1.1 and 1.1.7 on Minecraft 1.19.3, not on the version in this pack. Treat them as a rough idea of where the mod helps, not as numbers you'll get here.^[1]

Compatibility

ImmediatelyFast is built to interfere with other mods as little as possible and should work with most mods and modpacks. The mod page lists OptiFabric and OptiFine as known incompatibilities, along with most closed source clients like LunarClient and LabyMod.^[1]

Config options

The mod has a config file in your instance's config folder. The mod page says most options should be left at their defaults, but some can be tweaked for performance or compatibility.^[1]

• font_atlas_resizing makes the font atlas textures larger, which helps with high resolution or custom server fonts.^[1]
• map_atlas_generation puts map textures into a single texture instead of many, which helps when lots of maps are on screen.^[1]
• hud_batching submits fewer draw calls for the HUD. If HUD elements look wrong, try turning this one off.^[1]
• fast_text_lookup caches some data between text characters, which slightly speeds up rendering large amounts of text.^[1]

Unverified This pack doesn't ship a config file for ImmediatelyFast, so it's unconfirmed which of these options are enabled by default in this version or whether the pack changes any of them.

There's nothing to tune here. The pack ships no config file for this mod, so it runs entirely on its own defaults and there are no pack-changed values to point out.^[1]

That's fine, because the mod is built to be a drop-in client-side speedup. It replaces the immediate mode rendering path with a custom buffer implementation that batches draw calls and uploads data to the GPU more efficiently, covering entities, block entities, particles, text, the GUI and HUD, and immediate mode rendering from other mods. It also swaps in faster implementations for map rendering, HUD rendering and text rendering.^[1]

Unverified The mod may still generate its own config file on first launch outside the pack's config set, but nothing in the pack's files confirms that or any option names, so treat any settings you find in-game as unverified for this pack.

All the Mods 10 2.11 ships ImmediatelyFast 1.3.3+1.21.1 (the NeoForge jar), and the mod has been in the pack since 1.7 or earlier. Below are the notable changes from the mod's own changelogs, newest first, for the releases up to the one you have.^[3]

Unverified The pack's own changelogs have no entries for this mod, so nothing here says when the pack moved between ImmediatelyFast versions.

1.3.3

• Added support for 1.21.4 on Fabric and NeoForge.^[4]
• On Forge the mod is now marked as clientside only. The changelog calls this a visual-only change.^[4]

1.3.2

• Text layer draw order is now enforced. This fixes layering issues with custom fonts in server resource packs.^[5]
• Marked 1.21.2+ only: Forge support was readded, and compatibility with NeoForge 21.3.23+ was fixed.^[5]

1.3.1

• Fast buffer upload went back to the old approach. The streaming buffer method didn't show much extra performance, was more complex and error-prone, and doesn't work on older GPUs.^[6]
• If you see a significant performance drop or graphical glitches after updating to this version, the changelog asks you to open an issue on the mod's GitHub repository.^[6]
• Marked 1.21.2+ only: a performance regression on Apple GPUs was fixed, screen batching now only covers container items and the chat screen, and a workaround was added for an item cooldown render order issue.^[6]

1.3.0

• Added support for 1.21.2/1.21.3 and dropped support for 1.20.5/1.20.6.^[7]
• Fixed the wolf collar rendering order.^[7]
• Marked 1.21.2+ only: fast buffer upload was rewritten to have less overhead in high FPS scenarios, and the experimental universal HUD batching was made more efficient.^[7]
• Marked 1.21.2+ only: the ImmediatelyFast batching API was deprecated, because Mojang added basic batching into the DrawContext class and the mod now uses and extends that system. Mod authors migrate by removing calls to the old API and using the DrawContext for HUD rendering.^[7]