I don't think a javascript engine will ever be faster than .NET. Not debating the quality of the runtime, but win32 I/O Completion Ports and WSAAsyncSelect are

I don't think a javascript engine will ever be faster than .NET. Not debating the quality of the runtime, but win32 I/O Completion Ports and WSAAsyncSelect are up to par with Unix's (e|k)poll. With win32, your data will be hitting processor registers before the javascript engine ever has a chance to typecheck its arguments. Never underestimate the sheer power of easily circumventable abstractions ;-)