Counting iterations

[Andrew Dalke]

Derek Basch wrote:
> Interesting stuff Andrew. I do generally avoid string concantination
> for the reason listed in the Python Performance Tips but your analysis
> kinda puts that in question.

Thanks.

It was interesting for me to.  I hadn't looked at the implementation
for string % before and was rather surprised to find that it
overallocates 100 bytes to reduce the number of allocs done.  It's
simpler than the implementation I considered.

				Andrew
				dalke at dalkescientific.com