Most of the methods are still valid (you'll find out that the results are definitely dated, though)

You also need to keep in mind that strings in Python 3 are Unicode-only, so much of the processing will be different. The equivalent to a Python 2.x string is called 'bytes'. It would be interesting to use this to compare string vs bytes performance under Py3k.

The one test which definitely will not work out-of-the-box is #3, for the reason above. "Character" arrays are now referred to as "byte" arrays, and you'll have to change array('c') to array('b') to get the original 8-bit behaviour, or to array('u') to use Unicode characters.