The tips were posted by Guido on a recent GooglePlus post by him, and mentioned on the Net in a few places, so I happened to read those mentions. But the actual post was not available; it gave a 'post not found' error. I found it indirectly via this O'Reilly Radar post. So I made a paste for it, here:
Guido's Python performance tips.
- Vasudev Ram - Dancing Bison Enterprises