RFC on floating point output work

[Benjamin Kosnik]

>Yes, I contacted Jerry back in July and discussed a bit the various 
>options (i.e., snprintfv by Paolo Bonzini). Then Jerry proceeded alone a 
>long way and now I see that he has something already quite defined.
>
>I'm planning to study deeply his current floatconv.cc in the next few 
>days and report.

Sounds great, thanks!

>Jerry, which kind of speed improvements do you expect for the final 
>result (including localization)?

It would/will be really nice to remove the setlocale bits in this
codepath. The speed things are of course nice as well!

-benjamin