Re: [Boost-bugs] [Boost C++ Libraries] #8081: suggestion: avoid using postfix operator++ in transform_width

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #8081: suggestion: avoid using postfix operator++ in transform_width
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2013-02-25 20:13:27

#8081: suggestion: avoid using postfix operator++ in transform_width
-------------------------------+--------------------------------------------
  Reporter:  jinmei@…          |       Owner:  ramey        
      Type:  Patches           |      Status:  closed       
 Milestone:  To Be Determined  |   Component:  serialization
   Version:  Boost 1.53.0      |    Severity:  Optimization 
Resolution:  invalid           |    Keywords:               
-------------------------------+--------------------------------------------
Changes (by ramey):

  * status:  new => closed
  * resolution:  => invalid

Comment:

 "use of the postfix version is suboptimal in terms of efficiency"

 Not in this case.

 ++i is more efficient that i++

 but
 x = i; ++i

 is NOT more efficient than x = i++.

 If you check the generated machine language you'll see this.

 Robert Ramey

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/8081#comment:1>
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