optimization of list comprehensions

[Ulf Wiger (AL/EAB)]

> 	I think it's safe to say that even "average" industrial 
> 	programmers rather quickly learn to exploit the virtues
> 	of higher-order functions and iterators.
> 
> So yes, that seems to be a safe conclusion.

Actually, no, because my percentages were off by an
order of magnitude. Recalculated, the numbers are 
decidedly less supportive of the conclusion.

/Ulf W