Re: PATCH: minor C++ front end compile speed improvement

[Matt Austern <austern at apple dot com>]

On Dec 1, 2004, at 10:12 AM, Mark Mitchell wrote:

> Matt Austern wrote:
> > I'm seeing a bit under 0.5% improvement in QT builds from this.  
> > (Again: close to the limits of accuracy of my measurements, so take 
> > that number with a grain of salt.)  We avoid a test and a dereference 
> > in namespace_binding when we're looking things up in the global 
> > namespace, since we know the global namespace can't be an alias.
> > OK to commit to mainline?
> >             --Matt
>
> Zack pointed me at this.  Yes, this is OK.  I'm amazed it helps that 
> much, but profiling is always amazing.  Add a comment, please, 
> explaining why it is safe to do this.  (Not why it's a performance 
> win; just why it makes sense.)

Done!

And quite possible that the real gain is less than .5%.  See note above 
about salt.

			--Matt