GCC vs. LLVM/Clang On AMD's FX-8350 Vishera

Written by Michael Larabel in Software on 27 April 2013. Page 4 of 4. 12 Comments

LLVM/Clang is still known very well for its faster build times.

GCC 4.7.3 is faster than LLVM/Clang 3.3 SVN for the AMD FX-8350 system at the C-Ray multi-threaded ray-tracer.

Without OpenMP support, Smallpt is much faster on GCC.

The performance of LLVM/Clang 3.3 for most tests is at least comparable to GCC when ignoring the OpenMP-based application results. In a few benchmarks LLVM/Clang is faster, particularly when it comes to build times. Overall GCC is still generally faster with the generated application binary performance on the AMD FX-8350 "Bulldozer 2" setup running Ubuntu Linux.

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Michael Larabel is the principal author of Phoronix.com and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 20,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated benchmarking software. He can be followed via Twitter, LinkedIn, or contacted via MichaelLarabel.com.