Beginner Threaded file reading access

[Josiah Carlson]

> Multithreading will not help this sequence unless (A) you have multiple
> processors, or (B) the processing in bar() needs to wait for something.  If
> bar() is CPU bound, you would get the same performance by just executing
> sequentially.

It is even worse than that.  In windows, Python is really a single 
process, and no amount of threading is going to let one instance of 
Python use more than 100% of a single CPU.  I'm not sure if this is also 
the case with linux or OS X.

  - Josiah