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FreeBSD 9.1: LLVM/Clang Battling GCC

Michael Larabel

Published on 7 February 2013
Written by Michael Larabel
Page 4 of 4 - 41 Comments

LLVM Clang carried a modest performance against over GCC for Himeno on the Intel Core i7 system

There were no meaningful results out of 7-Zip.

LLVM Clang 3.1 had a small performance advantage over GCC 4.2.1 for the C-Ray multi-threaded ray-tracing.

GCC won with Primesieve and N-Queens again because of LLVM's lack of OpenMP support.

Overall, LLVM/Clang 3.1 as found in FreeBSD/PC-BSD 9.1 was generally faster than GCC 4.2.1, the last release that was licensed under the GNU GPLv2. Clang being faster though isn't a big surprise seeing as version 3.1 was released in 2012 while GCC 4.2.1 dates back to 2007. The areas where the GNU Compiler Collection managed to produce faster binaries on FreeBSD were in the OpenMP programs where LLVM/Clang still lacks support for the Open MultiProcessing API.

About The Author
Michael Larabel is the principal author of Phoronix.com and founded the web-site in 2004 with a focus on enriching the Linux hardware experience and being the largest web-site devoted to Linux hardware reviews, particularly for products relevant to Linux gamers and enthusiasts but also commonly reviewing servers/workstations and embedded Linux devices. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics hardware drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated testing software. He can be followed via and or contacted via .
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