vector typically doubles the size of memory it reserves when it needs more space. This is because every time it allocates new memory it must move the contents of the existing memory - it's slow to copy all the existing elements and so it makes sense to only increase as few times as possible (see http://www.ddj.com/cpp/184401375 for a discussion). Unfortunately this isn't a good stratergy when you are almost out of memory.
Another problem is that the memory must be contiguous (ie in one block), so if you frequently allocate and delete memory there might not be a single free block large enough - even if you have enough overall memory. There is also a little 'trick' to reduce a vector back down to the minimum required memory - see http://www.gotw.ca/gotw/054.htm Code: vector<stuff>( c ).swap( c ); (note - can someone confirm the swap() trick works with ref counting?) ------------------ Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=10259#10259 _______________________________________________ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
