Re: [Boost-bugs] [Boost C++ Libraries] #4820: any swaps inefficiently

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #4820: any swaps inefficiently
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2010-11-07 16:32:03

#4820: any swaps inefficiently
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  Reporter:  jonathandodd@…          |       Owner:  nasonov     
      Type:  Bugs                    |      Status:  closed      
 Milestone:  To Be Determined        |   Component:  any         
   Version:  Boost 1.44.0            |    Severity:  Optimization
Resolution:  invalid                 |    Keywords:              
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Comment (by jonathandodd@…):

 To clarify, when I run this there are in fact 5 copy constructor calls, 3
 of which were generated by swap.

 I have been assured that this is just me not turning on compiler
 optimisations, or not using boost::swap. However, even with the -o3 switch
 in gcc, and even with boost::swap, I still get 3 copy constructor calls.
 Since the best thing to do is just to swap over the pointers, I expected
 none.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/4820#comment:2>
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