The performance of <algorithm>.

Gabriel Dos Reis gdr@integrable-solutions.net
Thu Nov 20 00:51:00 GMT 2003


"Richard B. Kreckel" <kreckel@ginac.de> writes:

| Hi,
| 
| Well, I never bought the "An Inline Function is As Fast As a Macro" rumor.
| But still, an experiment using std::for_each shows rather disturbing
| results.  Given
|     struct A { virtual void someaction(); };
| can anybody give an easy explanation why
|     for_each(av.begin(), av.end(), mem_fun(&A::something));
| blows up the size of the compiled code by a factor of two compared to the
| straightforward implemenation?  (Even when one hacks for_each to be
| inlined?  (BTW, why isn't it inlined?))

Do you mean that when you declare std::for_each as an inline function?

We really really badly need to convince the compiler to support
language use patterns, not the other way around.

-- Gaby



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