Hunting for performance regressions in libstdc++

[Jonathan Wakely]

On Wed, Jun 15, 2005 at 09:09:54PM -0700, Dan Kegel wrote:

> I have a sneaking suspicion that some of my app's
> performance problems might be due to gcc-3.4.3's libstdc++
> being somehow slower than SGI's STL, so I'm planning
> on doing some performance testing of various implementations
> of STL.

You aren't, by any chance, using std::set::insert() with hints ?

We changed the behaviour of that function recently to conform to the
standard, which contradicts the traditional meaning of the hint. If
you are supplying a hint that points just before the insertion point
you will not get any speed-up.

jon

-- 
"The tools we use have a profound (and devious!) influence on our
 thinking habits, and, therefore, on our thinking abilities."
	- Edsger Dijkstra