I didn't say "Python and Ruby are fast because they can call C code". I responded to your claim that people using Python or Ruby for their applications don't h

I didn't say "Python and Ruby are fast because they can call C code". I responded to your claim that people using Python or Ruby for their applications don't have performance checklists, which is bullshit - part of that checklist (towards the bottom, hopefully) is refactor important bits to C.