Wip sip23 √

Hi @mariusaeriksen,
I'm not sure I understand, what's the concern? The recommendation in the documentation?

I did some experimentations earlier, which seem to work great:
https://gist.github.com/viktorklang/8652470
https://gist.github.com/viktorklang/8652944

@richdougherty can provide some background on the issues of prepare()