Yes, I was indeed talking about two different things. One is the CLR-in-SQL function, and the other is a pure C# application.

I think the C# application was fairly well protected...

That is the C# code! The cruft needed to deploy might be difficult, but they made some things elegant. That method I posted is the whole method.

I can send over...

It is irritating how big the gap is between the performance here and high-performance code, though. Why should we have to be impressed that multiplying a million numbers takes 800...