Create more examples

Recently I've stumbled over a lot of "best practices" blog posts like this:
http://www.mdproductions.ca/guides/50-best-practices-to-optimize-php-code-performance
I wonder how much of that is actually true. It would be fun to test a couple of these assumptions with PHPench.

Also, there's a lot fo benchmarks on http://www.phpbench.com/ that could need some graphs.
