On: Fibers aren’t useful for much any more

[mwcampbell]

> Not really. WinForms is a lot of the reason for C#'s existence, and WinForms is just a wrapper around pinvoke'd Win32. You're crossing the boundary a lot.

I wonder if that's why WPF does so very much on the managed side. And I wonder if using UWP XAML from C# is less efficient than WPF in some scenarios because of this FFI overhead.

[pjmlp → mwcampbell]

According to React Native for Windows team it is hardly noticeable.

On their benchmarks comparing XAML/C++, XAML/C#, RN and Electron, it is hardly a few percentile more than C++.

It is Electron that goes sky high in performance loss.