String copy idiom.

[Alan T. Bowler [SDG]]

Actually my favourite string copy idiom is
     strcpy(s, t);
On most machines this generates a smaller sequence, and I can frequently
count on the C implementor having supplied a code sequence,
(possibly written in assembler) that has been optimized for the particular
machine.  At worst if performance is a real problem, and the implementor
didn't, I can write my own assembler routine once for this machine,
rather than having to find all the places I coded my own string copy.
   On most large machines I know there are character vector instructions
that will allow implementation of a string copy that is faster than
any sequence I can code in C.