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I've written quite a bit about performance on my blog: http://blog.wesmckinney.com. The historical (v)benchmarks page is a good resource (but doesn't compare to any other libraries): http://pandas.pydata.org/pandas-docs/vbench/

what are you using to display code on your blog, it's really nice!

Recent posts use the Crayon syntax highlighter for Wordpress. Though I'm thinking about ditching WP eventually for a workflow more like http://jseabold.net/blog/2012/01/project-genesis.html.