ImmediatelyFast in FTB Evolution 2

Same as in the All the Mons 1.3.0 guide

ImmediatelyFast is a client-side performance mod. It speeds up what Minecraft calls immediate mode rendering, which is a big part of how the game draws things on your screen every frame. It's built to be lightweight and to play nicely with other mods.^[1]

This pack ships ImmediatelyFast 1.6.13 for Minecraft 1.21.1 on NeoForge. It has been part of the pack since 0.3.0-beta or earlier.^[2]

What it speeds up

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

• Entities^[1]
• Block entities^[1]
• Particles^[1]
• Text rendering^[1]
• GUI and HUD^[1]
• Immediate mode rendering done by other mods^[1]

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

Compatibility and config

The mod aims to interfere with other mods as little as possible and should work with most modpacks. Its known incompatibilities are OptiFabric/OptiFine and most closed source clients such as LunarClient and LabyMod.^[1]

It has a config file in the config folder of your instance. Most options are best left at their defaults, but a few can be tweaked for performance or compatibility. For example, if you see problems with HUD elements, the author suggests turning off the hud_batching optimization.^[1]

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]

Same as in the All the Mods 10 8.1 guide

ImmediatelyFast doesn't add machines, multiblocks, power, fluids or item handling, so there is nothing to build or automate with it. It's a client-side performance mod that speeds up immediate mode rendering, and the only "mechanic" is how it draws things on your screen.^[1]

How it works

The mod swaps in a custom buffer implementation that batches draw calls and uploads data to the GPU more efficiently. This covers entities, block entities, particles, text rendering, the GUI/HUD, and the immediate mode rendering of other mods.^[1]

It also makes targeted changes where vanilla rendering code is replaced with a faster implementation. Those targeted changes cover map rendering, HUD rendering and text rendering.^[1]

When you'll notice it

The mod can only raise your FPS when your CPU is the bottleneck. That's most likely the case unless your GPU is ancient or you run very heavy shaders, and slower CPUs benefit more than very fast ones.^[1]

The author's own benchmarks were run on Minecraft 1.19.3 with early versions of the mod, not on this pack's version, so treat them as a rough guide only. They reported FPS around 2x higher on busy servers for entity rendering, about 5x higher with many maps on screen, about 40% higher for the HUD, about 2x higher with many signs or holograms, and about 20% higher with many block entities nearby.^[1]

Config options

The mod's project page describes a config file in the config folder of the instance, and says most options should stay at their defaults. These are the options it lists:^[1]

• font_atlas_resizing: increases the size of the font atlas textures, which helps with high resolution or custom server fonts.^[1]
• map_atlas_generation: puts map textures into a single texture instead of several, which helps when many maps are on screen.^[1]
• hud_batching: submits fewer draw calls for the HUD. If HUD elements look wrong, the page suggests disabling it.^[1]
• fast_text_lookup: caches some data between text characters, which slightly improves performance when rendering a lot of text.^[1]

Unverified No config file for this mod was available for this pack, so the values the pack actually uses for these options are unconfirmed. The descriptions above come from the mod's project page and describe the mod in general, not this pack's settings.

FTB Evolution 2 1.1.0 ships ImmediatelyFast version 1.15.3+26.1, using the NeoForge jar. The mod was already in the pack in 1.0.2 or earlier, so it is not a new addition in this release.^[3]

Changes in 1.15.3+26.1

This is the version your pack runs. The mod's own changelog for it lists these changes:^[3][4]

• Experimental sign buffering was made Vulkan compatible.^[4]
• The sign atlas size is now configurable.^[4]
• The core shader blacklist was updated.^[4]

Unverified The sources here show no pack changelog entries for this mod, so changes to it between FTB Evolution 2 releases are not confirmed.