WordCount performance

[Walter Bright]

You guys do have a point that perhaps syncing is not needed on stdin. 
But I'm a little leery of removing it, as it is needed for output, and 
I'm not comfortable that this is thought through thoroughly.

But my other point is that this is an issue with the Digital Mars C 
runtime library, and has nothing whatsoever to do with D or the 
optimizer/backend of D.