How is Gnumeric so fast?

[Leon Taylor <leontaylor476 gmail com>]

Hi all,

I was absolutely blown away by how fast Gnumeric is. It is amazing!

I understand that Gnumeric was programmed in C, which means that it was 
going to be fast, but LibreOffice Calc and Excel would be programmed in 
C++, which is just as fast as C (That is, assuming that it is well 
written C++).

What is it that makes Gnumeric so good for crunching numbers? Was it 
designed to be that way?

Thanks, Leon.