Large performance regressions from 2.95.2/3 to HEAD

[Gerald Pfeifer]

On Thu, 29 Jun 2000, Daniel Berlin wrote:
> In every benchmark i can find, i see large performance regressions in
> the performance of the generated.

That absolutely mirrors my experience for template heavy C++ code.

As far as I can see, this significant regression happened about the
time when the C++ front-end switched to tree-based inlining (which
should actually improve performance, but note that I'm referring to
the *time*, not the changes themselves).

> I see the same type of decrease in other things using templates vs
> non-templates. While the non-templated stuff is usually quite a bit
> faster, the stuff using templates seems to be at least half as fast,
> if not worse.

Yup. I could not provide a small test case, but based on your results
with the Stepanov benchmarks these certainly are worth having a look!

Gerald
-- 
Gerald "Jerry" pfeifer@dbai.tuwien.ac.at http://www.dbai.tuwien.ac.at/~pfeifer/
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