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[Bug libstdc++/50160] vector<bool> comparison very slow (no overload)
- From: "paolo.carlini at oracle dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Wed, 31 Aug 2011 00:56:42 +0000
- Subject: [Bug libstdc++/50160] vector<bool> comparison very slow (no overload)
- Auto-submitted: auto-generated
- References: <bug-50160-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50160
--- Comment #25 from Paolo Carlini <paolo.carlini at oracle dot com> 2011-08-31 00:56:42 UTC ---
I think a separate Bugzilla requesting as an enhancement such intrinsics would
be certainly appropriate. I'm sure other code could exploit those.
Note, in the meanwhile we could as well do the exercise of separating the
operation to a C function - for unsigned long, the 32-bit and 64-bit cases
would be good enough for now - coded perhaps along the lines explained at the
beginning of Ch. 7 of "Hacker's Delight" and use the function for operator<
(please, not inline). See which performance come out.