Intel Broadwell: GCC 4.9 vs. LLVM Clang 3.5 Compiler Benchmarks

Written by Michael Larabel in Software on 30 January 2015. Page 1 of 4. 20 Comments

Another day, another round of Intel Broadwell Linux benchmarks. Being looked at this morning are some GCC vs. Clang compiler benchmarks for this latest Intel microarchitecture succeeding Haswell.

GCC 4.9.2 and LLVM Clang 3.5.0 were benchmarked using the packages provided on Fedora 21 x86_64. The same Lenovo ThinkPad X1 Carbon was used for all of the benchmarks, the first Broadwell laptop/ultrabook at Phoronix and it features the Core i7 5600U that's dual-core with Hyper Threading and tops out at 3.20GHz. Fedora 21 was running with the Linux 3.17.8 kernel while testing each of the provided compilers.

A variety of C and C++ open-source benchmarks were used to look at the performance of the resulting code under GCC 4.9 and LLVM/Clang 3.5. A look at GCC 5 and LLVM Clang 3.6 with Broadwell will be saved for a future article on Phoronix. All of these code benchmarks this Friday morning were done by the open-source Phoronix Test Suite software.

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