Hello,

I recently upgrade boost version of a visual C++ program from an old version of 1_58_0 to 1_64_0.  Compared to the original executable, the newly upgraded one runs very slow (more than 6 times longer) even I disable the debug mode and set the optimization to /ox in visual environment.

The other difference between the old and the upgrade ones is the visual studio version. The old one is on 2010 and the new one 2013.

Anyone has any idea for why it behaves like this? Which kind of performance tuning I need to look into?

Thank you so much for your help!