What's about the efficiency of using c to OOP compare to the c++'s abstraction?

["la deng" <ladeng mimi gmail com>]

reference to the c++'s father's interview

http://www.artima.com/intv/abstreffi.html

fortran and c++ can  achive good performance for they can abstract in
higher level and  their compiler can think in higher level to avoid
the cache miss (like in the array vs vector )or to achive the "no
code"

The gtk hasn't the gtk'compiler to help at the high level Optimization

Then ,what's the power of gobject vs c++ with the compiler's
Intelligence in OOP?

any input will be appreciated