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Re: binary_search, lower_bound and upper_bound inlining
- From: Dimitris Xochellis <jimxoch at yahoo dot gr>
- To: libstdc++ at gcc dot gnu dot org
- Date: Sun, 1 Apr 2007 17:45:11 +0100 (BST)
- Subject: Re: binary_search, lower_bound and upper_bound inlining
Thanks for answering,
> >Is there something that I can do, other than editing the stl_algo.h file, in order to persuade
> the
> >compiler to inline the binary_search, lower_bound and upper_bound algorithms? (even -O3 seems
> not
> >good enough). Any chance for these algorithms to be inlined in the future GCC releases?
> >
> >
> we can definitely mark inline binary_search, very tiny, but frankly, for
> general use lower_bound and upper_bound seem too big and we risk a bad
> code bloat.
I suspected so :( That's life anyway...
> Can you measure a small improvement for binary_search alone?
By studding my measurements I suspect that binary_search is automatically inlined in -O3 (probably
because it is small). Anyway the "big fish" is lower_bound, binary_search is just more convenient
sometimes.
>
> In general, anyway, you should refer to the gcc manual, there are
> various knobs you can turn in order to change the behavior of the
> inliner (-finline-limit=...)
I found nothing appropriate in the manual. (-finline-limit works for functions that are explicitly
marked as inline)
Thank you very much,
-Jim
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