From Bertrand:

Here is TWinNTSystem.cxx who solves the problem
of 100% CPU usage in batch mode...and speeds up
benchmarks.c executed in batch mode as :
root -b -q benchmarks.c


git-svn-id: http://root.cern.ch/svn/root/trunk@5938 27541ba8-7e3a-0410-8455-c3a389f83636