If one of your main concerns is performance, then all I can say is don't use Blazor. WASM will never be able to compete with regular JS so long as it has to go

If one of your main concerns is performance, then all I can say is don't use Blazor. WASM will never be able to compete with regular JS so long as it has to go through an interop layer, plus it has to send down and parse an entire interpreter before it can even start looking at your actual UI and business logic. Server Side has to wait for a server response for every single action you take, and any small drops can make the entire thing sluggish, or even buggy. That's not to say it isn't cool and can't work for some projects where say, development speed is more important, but performant it just aint.