Slowness of c++

["Kurt V. Hindenburg" <khindenb gte net>]

Hello,
  This might not be the correct play for this question, but maybe 
someone's knows the answer.
  I'm changing a C program using gtk into a C++ with the VDK 
wrapper.  I've noticed that while they both are using 
gtk_timeout_add, the C++ is ..much.. slower than the C one.
Basically, the C++ program is using a lot more CPU and the mouse 
is very sluggish..it take almost a second after clicking on the close 
window button for the program to quit.  The C program however is 
quite fast with no noticeable slowness.
  Is this due to the C++ wrapper VDK?  Poor C++ programming (I 
am a novice)?  Or what?
  Thanks,
      Kurt