I've done a little bit of speed testing showing extremely slight differences, 
but wonder if anyone who understands the "engine" can advise on this:

Is there a difference between these two approaches?

(1) put fld 1 into txt; repeat for each line k in txt; etc.

and
(2) repeat for each line k in fld 1; etc.

For no very good reason, I tend to do (1), but have begun to wonder:  for a 
very lengthy field 1, does my writing to a variable use up more RAM, and so 
perhaps injure performance?  Or is the engine in effect writing to a variable 
either way?  Is a variable read more quickly than a field?  

Many thanks.
David Epstein
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