http://bugzilla.opensuse.org/show_bug.cgi?id=1162291 http://bugzilla.opensuse.org/show_bug.cgi?id=1162291#c2 --- Comment #2 from Jürgen Fuhrmann <juergen-fuhrmann@web.de> --- Hi, in order to discriminate from a possible hardware problem I booted into KDE 15.1 live with Kernel 4.12 and run the example under g++-7. It shows the same problem with poor omp performance for larger vectors. Therefore I now think it is a problem with my laptop hardware and no Linux component is to blame. Unless there is similar experience with (this) hardware and someone can give me a hint which parameters could be tuned to fix the problem, this report can be closed. I attach the output of lscpu and lsmem. Jürgen -- You are receiving this mail because: You are on the CC list for the bug.