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AnswerRe: C++ Code to call a Rest Based Web Service API Pin
Albert Holguin15-Mar-13 8:34
professionalAlbert Holguin15-Mar-13 8:34 
GeneralRe: C++ Code to call a Rest Based Web Service API Pin
raghunath sahoo15-Mar-13 8:55
raghunath sahoo15-Mar-13 8:55 
GeneralRe: C++ Code to call a Rest Based Web Service API Pin
raghunath sahoo15-Mar-13 8:57
raghunath sahoo15-Mar-13 8:57 
AnswerRe: C++ Code to call a Rest Based Web Service API Pin
Albert Holguin15-Mar-13 9:32
professionalAlbert Holguin15-Mar-13 9:32 
QuestionVC++ and Empty Base Class Optimization problem/bug Pin
Kosta Cherry15-Mar-13 4:45
Kosta Cherry15-Mar-13 4:45 
AnswerRe: VC++ and Empty Base Class Optimization problem/bug Pin
Matthew Faithfull15-Mar-13 6:01
Matthew Faithfull15-Mar-13 6:01 
GeneralRe: VC++ and Empty Base Class Optimization problem/bug Pin
Kosta Cherry15-Mar-13 6:23
Kosta Cherry15-Mar-13 6:23 
GeneralRe: VC++ and Empty Base Class Optimization problem/bug Pin
Matthew Faithfull15-Mar-13 6:36
Matthew Faithfull15-Mar-13 6:36 
The example you give would not need an 'extra' pointer because it would only need the one to the external vtable as everything internal can be optimised away. So far only when you have an internal and an external base you have found the size increases. It's likely that even in that case the internal base could be optimised away but it isn't which may be a flaw in the Microsoft compiler or there may be some practical reason why that shouldn't be done. As I mentioned there are quite a number of combinations of single vs multiple inheritance, virtual and non-virtual bases, local and external bases, exported and non exported, complete and incomplete classes at the point of first declaration. Some optimisations such as empty base class removal will be available under some combinations and not others. For a comparison you could try the Clang compiler which is more C++11 compliant than MSVC and being open source has support forums where you can ask exactly why they did it a particular way. Some odd behaviour in this area in MSVC is more about backward compatability of the resulting binaries with older version of the compiler and of Windows than about mistakes in the current version.
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Thucydides (B.C. 460-400)

GeneralRe: VC++ and Empty Base Class Optimization problem/bug Pin
David Crow15-Mar-13 7:34
David Crow15-Mar-13 7:34 
GeneralRe: VC++ and Empty Base Class Optimization problem/bug Pin
Kosta Cherry15-Mar-13 8:45
Kosta Cherry15-Mar-13 8:45 
AnswerRe: VC++ and Empty Base Class Optimization problem/bug Pin
jschell15-Mar-13 8:56
jschell15-Mar-13 8:56 
QuestionHow Can I set Noise In Image ? Pin
002comp14-Mar-13 19:25
002comp14-Mar-13 19:25 
AnswerRe: How Can I set Noise In Image ? Pin
Marco Bertschi14-Mar-13 22:21
protectorMarco Bertschi14-Mar-13 22:21 
AnswerRe: How Can I set Noise In Image ? Pin
nv316-Mar-13 2:16
nv316-Mar-13 2:16 
QuestiontimeGetTime() is unreliable on my computer too, not monotonic! Pin
Robert Inventor14-Mar-13 18:04
Robert Inventor14-Mar-13 18:04 
AnswerMessage Closed Pin
14-Mar-13 18:15
Robert Inventor14-Mar-13 18:15 
GeneralMessage Closed Pin
14-Mar-13 18:20
Robert Inventor14-Mar-13 18:20 
GeneralMessage Closed Pin
14-Mar-13 18:53
Robert Inventor14-Mar-13 18:53 
GeneralMessage Closed Pin
14-Mar-13 19:19
Robert Inventor14-Mar-13 19:19 
AnswerRe: timeGetTime() is unreliable on my computer too, not monotonic! Pin
Robert Inventor19-Mar-13 7:31
Robert Inventor19-Mar-13 7:31 
QuestionQueryPerformanceCounter inaccurate timing even with use of SetThreadAffinityMask Pin
Robert Inventor14-Mar-13 15:50
Robert Inventor14-Mar-13 15:50 
AnswerRe: QueryPerformanceCounter inaccurate timing even with use of SetThreadAffinityMask Pin
Robert Inventor14-Mar-13 18:07
Robert Inventor14-Mar-13 18:07 
GeneralRe: QueryPerformanceCounter inaccurate timing even with use of SetThreadAffinityMask Pin
dusty_dex15-Mar-13 0:24
dusty_dex15-Mar-13 0:24 
GeneralRe: QueryPerformanceCounter inaccurate timing even with use of SetThreadAffinityMask Pin
Robert Inventor18-Mar-13 14:44
Robert Inventor18-Mar-13 14:44 
GeneralRe: QueryPerformanceCounter inaccurate timing even with use of SetThreadAffinityMask Pin
dusty_dex18-Mar-13 22:08
dusty_dex18-Mar-13 22:08 

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