compiler for ubuntu x86-64

[Mark Morss]

My thanks to all who answered.  Clearly, it was a case of 
ignorance on my part.  I'll download and install the amd64 binary.

Concerning "does not execute that well," I should have said, 
"that fast."  My experience with compiled languages has been that 
depending on the compiler you use, you can get very different 
execution times.

But that point is moot.

Again, thanks to all.