Fastest prototyping language?

I want to write programs as fast as I can. Which language should I learn?

Using program length as a rough indicator, Forth is the choice. Samples I've seen like web servers, operating systems, database managers, etc. are significantly shorter in Forth.

But I've seen some really short Perl and Haskell routines too.

And Lisp is supposed to allow you to work at such high levels of abstraction that it should also make short applications.

Ruby gets a lot of comments about short line counts compared to Perl and Python.

Assuming
   -identical toolset library functionality,
   -maximum expertise in all the candidate languages
   -no concern of readability, "transparent" design, or 
    execution speed
which language syntax will allow you to write your program fastest?

In b4 machine code.

Graham is snorting something. Here's why Lisp isn't more popular:

* there isn't a one (and only one) canonical release
* this canonical release should be actively supported
* this canonical release should have a modern "batteries-included" library
* it should be free

Wow. That was short. It's also absolutely required for any language that isn't being pushed by a large commercial entity to have a hope in succeeding.

Except that Lispniks, in their brilliance, are finding excuses why having a myriad different CL and non-CL implementations is totally awesome.

Oh, being stuck with SLIME doesn't help either. Nothing wrong with it, but the majority of people aren't going to learn Emacs for one language.