This is a nuget package, it's a source generator for a faster enum ToString method.
See here for the idea: https://www.youtube.com/watch?v=BoE5Y6Xkm6w&t=1s&ab_channel=NickChapsas
The Nuget package is here: https://www.nuget.org/packages/EnumFasterizer/
Once installed use SomeEnum.Somevalue.FastToString()