• bearophile <bearophileHUGS lycos.com> Feb 04 2011
• "Robert Jacques" <sandford jhu.edu> Feb 04 2011

bearophile <bearophileHUGS lycos.com> writes:

Steven Schveighoffer:

 Most of the time the extra word isn't noticed  
 because the memory size of a class is usually not exactly a power of 2.


I'd like to know in a normal object oriented program how much memory this
design actually wastes.

Thank you to you and Kagamin for your answers,
bye,
bearophile

"Robert Jacques" <sandford jhu.edu> writes:

On Fri, 04 Feb 2011 16:02:55 -0500, bearophile <bearophileHUGS lycos.com>  
wrote:

 Steven Schveighoffer:

 Most of the time the extra word isn't noticed
 because the memory size of a class is usually not exactly a power of 2.


 I'd like to know in a normal object oriented program how much memory  
 this design actually wastes.

 Thank you to you and Kagamin for your answers,
 bye,
 bearophile


1 word per object, assuming a uniform distribution of object sizes.  Yes,  
_most_ objects aren't affected, but the ones that are make up for the  
difference by using twice the ram.