> When the ratio given in the last column is greater than 1, then
 > threaded code is faster than the switch-based solution. As you can
 > see, this is only true in my case for non-hyper-threaded
 > architectures.

Which version(s) of gcc do you use for compiling the bytecode
interpreter?  Is it the same version on all machines?

The reason I'm asking is that some versions of gcc are known to
generate poor code for threaded interpreters, e.g. gcc 3.2 generates
inferior code compared to gcc 2.95.  For more info, google for
"Anton Ertl gcc".

- Xavier Leroy