Comment 1 for bug 1251488

Note that according to http://gcc.gnu.org/wiki/Graphite/Parallelization and the linked document

http://gcc.gnu.org/wiki/AutoparRelated?action=AttachFile&do=get&target=autopar_performance_testresults.pdf

...auto-parallelization is extremely stupid, in that it will add a synchronisation overhead to every execution of every inner loop, even if the loop would complete on a single core in much less time than it takes to do the synchronisation. So there is a good chance that enabling it would actually slow down the application.