16 Apr
2010
16 Apr
'10
6:21 p.m.
VC++ 2010 now has the iterator checking disabled by default; It is probably unlikely that you were unknowingly running with checking enabled, but that would easily explain the speedup.
I tried setting -D_SECURE_SCL=0 in Visual C++ Release mode, however then the program crashed right away. Possibly because depencies, such as OpenSceneGraph and QT were still built with the default settings. But anyway, thanks for the pointer. That looks like a hot candidate to investigate.