Most GPUBooster features from ~1.21 are now included in the vanilla renderer(DSA, VertexFormat cache, etc.).
As a result, mod now focuses on heavy graphical processing (shaderpacks, large numbers of render objects, etc.) and stabilising the game engine.

Features(configurable):

• SIMD culling (from ~1.21)
• Core DSA (GL 4.5 instead of ARB)
• Fast matrices (from ~1.21)
• Constant caching
• Render pipeline caching (1.2.2+)
• Disabling GL error log
  

1.2.2+:

1. It may take some time for the results.
2. The FPS gain may be insignificant (around 1–3%), BUT stability should improve.