CPU time to book and fill an Histogram with 10 events.

Type AIDA_ROOT AIDA Native ROOT Native
  (sec/10^6 evts) (sec/10^6 evts) (sec/10^6 evts)
Histogram 1D 0.85 1.11 0.75
Histogram 2D 1.39 2.24 1.27
Histogram 3D 2.14 5.9 1.97
Profile 1D 1.28 1.61 1.22
Profile2D 1.73 2.44 1.64
Cloud1D   1.87  

C++ test program for the PI histograms

C++ test program for native ROOT