> Dart+Flutter look promising until you notice that they run Skia WASM inside the dart VM which itself runs in WASM which runs inside a JS VM and performance is abysmal.

That's not how Flutter works on either of the platforms it supports.

When you run natively (e.g. mobile, desktop, etc) Skia or Impeller execute natively and all your Dart code is compiled ahead-of-time to native code as well. No JS or Wasm is involved anywhere in the stack. No JIT compilation in release binaries, only during development.

When you run on the Web - then naturally Skia is compiled to Wasm and Dart code is compiled to JS or Wasm, JS VM will end up running both of those. No Dart VM is involved anywhere here.