Hi Tomas,

> ... (zero A) ...
> ..
> Have you measured and/or noticed impact on performance of these
> micro-optimizations?  I mean, are they really worth it?

Very probably not ... it is similar to the situation with 'do' ;-)

Still I think it is good to have certain convenience functions that
don't evaluate their arguments. Not having to quote their arguments
makes their use a little shorter and more readable. No big deal.

This applies to many other functions, too: Do we really need 'if' when
we have 'cond'?

- Alex

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