John> Sorry, Skip, but I find that very hard to believe. The foo()
John> function would take quadratic time if it were merely adding on
John> pieces of constant size -- however len(str(i)) is not a constant,
John> it is O(log10(i)), so the time should be
John> super-quadratic.
Sorry, I should have pointed out that I'm using the latest version of
Python. I believe += for strings has been optimized to simply extend s when
there is only a single reference to it.
Skip
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