[Bug c++/53292] multi-threaded (OpenMP) is slower than single-threaded

[fh_p at hotmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53292

--- Comment #9 from FH <fh_p at hotmail dot com> 2012-05-12 21:27:31 UTC ---
Well...

I tested an OpenMP benchmarch (design to demonstrate OpenMP performances) found
on the web : multi-threaded (OpenMP) is again slower than single-threaded. I
looked at coding with pthreads : same thing.

So, I have a dual-core hyper-threaded PC : I end up with multi-threaded
applications slower than single-threaded and this is supposed to be a "normal"
behavior ?!... Anyway this is still illogical to me ?!?!