GCC 7.0 vs. LLVM Clang 4.0 Performance With Both Compiler Updates Coming Soon

Written by Michael Larabel in Software on 28 January 2017 at 09:11 AM EST. Page 3 of 6. 28 Comments.

With the SciMark2 micro-benchmark, Clang was leading over GCC.

Clang 4.0 does fix a regression from Clang 3.9.1 for SciMark2's Monte Carlo sub-test.

Clang leads over GCC in SciMark2 largely behind it does much better with the Dense LU Matrix Factorization test to raise its composite score.

The Jacobi Successive Over-Relaxation test also heavily favors Clang.

The TSCP chess engine results lean slightly in favor of GCC.

Ever since Himeno's performance was boosted by GCC6, Clang trails the FSF's compiler with this poisson pressure solver.