profiling info on stderr; print only if it makes sense

Signed-off-by: Eddy Petrișor <eddy.petrisor@gmail.com>
disables code with #if 0

Signed-off-by: Eddy Petrișor <eddy.petrisor@gmail.com>
close string

Signed-off-by: Eddy Petrișor <eddy.petrisor@gmail.com>
'make -j' profile results

Signed-off-by: Eddy Petrișor <eddy.petrisor@gmail.com>