agile sand
This mod optimize the game by a lot, improves rendering of various elements of the game which results in a huge performance boost. Optimizes all immediate mode rendering by using a custom buffer implementation which batches draw calls and uploads data to the GPU in a more efficient way.
The following parts of the immediate mode rendering code are optimized:
- Entities
- Block entities
- Particles
- Text rendering
- GUI/HUD
- Immediate mode rendering of other mods
Would be a good touch of performance on modern versions, i know that you could add mods but adding built in performance mods is better. 
dull tusk
velvet crypt
unborn elbow
granite harness