Extreme Optimization!

Vanilla Launcher version offers the same features for Vanilla Launcher, just unpack "mrpack" to "mods" (cannot automatically update like third-party launchers).

Highly recommend these mods, not added to the modpack, because they do not correspond to the concept of extreme optimization and "Base", but may be more useful than others QoL mods:

Let Me Despawn - Improves performance by tweaking mob despawn rules.

Raw Input - Can make mouse input feel smoother and fix mouse jittering.

Fix Experience Bug - When players travel to and from other modded dimensions, there is a bug in minecraft where their experience is displayed as zero until they earn one new experience point or log out of the game and log back in.

NormalASM - Optimize RAM usage. Fixes crashes, within different mods, and Forge itself. Optimizes code in general.

TexFix - After everything is loaded it goes over your texture manager and deletes all the none animate sprites from your ram to reduce the amount of Ram that is using.

Nothirium - Changes Minecraft's chunk rendering engine to use modern OpenGL which greatly increases performance. This mod is similar to Sodium but this is not a port of Sodium.

JEI - Item and recipe viewing mod for Minecraft, built from the ground up for stability and performance.

Libraries (not necessarily, but can help with some errors):

Mixin 0.7-0.8 Compatibility

MixinBootstrap

* "Dependencies" shows only 90% of the mods in the modpack.