Re: [Boost-bugs] [Boost C++ Libraries] #11312: smart_ptr::detail::as_allocator::allocate() adds alignment padding when it's not needed

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #11312: smart_ptr::detail::as_allocator::allocate() adds alignment padding when it's not needed
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2015-05-17 05:08:16

#11312: smart_ptr::detail::as_allocator::allocate() adds alignment padding when
it's not needed
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  Reporter:  David Aue <david@…>  |      Owner:  glenfe
      Type:  Bugs                 |     Status:  new
 Milestone:  To Be Determined     |  Component:  smart_ptr
   Version:  Boost 1.57.0         |   Severity:  Problem
Resolution:                       |   Keywords:
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Comment (by glenfe):

 One optimization I could do is instead of adding `alignof(type)` bytes:
  * If `alignof(value_type) >= align(type)` then do not add any additional
 padding.
  * Else add `alignof(type) - 1` bytes for padding.

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Ticket URL: <https://svn.boost.org/trac/boost/ticket/11312#comment:4>
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