OptiFine D1 for 1.12.2 is out with massive performance improvements.
The new option "Render Regions" can double the FPS on longer render distances, especially when combined with VBOs.
OptiFine E1 for 1.12.2 is out:
- added performance option Smart Animations
- added dynamic lights for mod items
- custom animations with interpolate/skip frames
- many bugfixes
- compatible with latest Forge