https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78404
Bug ID: 78404 Summary: SciMark v2.0 Sparse Matrix Multiply test is 20% slower under GCC 6.2 than under Clang 3.9 Product: gcc Version: 6.2.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ Assignee: unassigned at gcc dot gnu.org Reporter: t.artem at mailcity dot com Target Milestone: --- As per http://www.phoronix.com/scan.php?page=article&item=gcc-clang-kblclear&num=2 GCC 6.2.0 - 1835 Clang 3.9.0 - 2204 g++ options: -O3 -march=native CPU: Kaby Lake 7200U (the same CPU core as Sandy Bridge)