Ordering of vector variables?



Richard Fateman wrote:
> Re-examining 'great' and friends should be done with extreme caution.

If nothing else is done, we should at least do this:  Add a big comment 
on great that extreme care needs to be exercised when modifying it.


> I believe that the simplifier spends the vast majority of its time in
> 'great' etc.  Code to make this stuff exponentially faster, at least
> with lisps that have good hash coding, has been demonstrated (by me).

This sounds quite interesting.  Did you have specific examples that 
became much faster with this change?  Do simple cases become slower?

Ray