dotnet and Rust are essentially neck and neck on plain text. On any benchmark that actually does work though, dotnet is nowhere to be found (less than half the performance of actix).
Yea, actix is definitely faster than ASP.NET Core and in many benchmarks it is 2x performance wise. My only point really was that ASP.NET core offers better performance compared to almost any other widely used web framework out there.
Additionally, performance improvements have and continue to be a focus, with steady progress to show for it.