I wonder what the performance difference would be between using the Python Apache plugin and running qrencode - the C executable ( http://fukuchi.org/works/qrencode/index.en.html ).

I know it's not clean to call shell commands from Apache - not to mention the obvious performance hit with swapping environments - but perhaps the ELF vs Python JIT might compensate for this.

Also, i'd be interested in a comparison of features between the two.