TridentPerf is a Forge 1.20.1 (Java 17) client-side mod that pins game threads to P-cores, prewarms/caches OpenGL shaders, and live-tunes settings to stabilize frametimes in heavy modpacks, with or without shaders.
A lightweight mod that lets you configure packet limits and payload sizes, providing a controlled and more efficient alternative to mods that simply remove all limits.