Lithium 0.12.1 is the first release for 1.20.3.
You can check out all configuration options at [description of all optimizations here](https://github.com/CaffeineMC/lithium-fabric/blob/mc1.20.3-0.12.1/lithium-mixin-config.md).
**Full Changelog**: https://github.com/CaffeineMC/lithium-fabric/compare/mc1.20.2-0.12.0…mc1.20.3-0.12.1
## Additions
— Very experimental item entity optimizations (disabled by default for now)
— Caching of block class analysis, reducing startup times
