Intel Ivy Bridge: GCC 4.8 vs. LLVM/Clang 3.2 SVN

LLVM/Clang 3.2 SVN managed a small lead with the Crafty chess workload.

GCC 4.8 returned on top with LAME MP3 encoding where it had a slight performance advantage.

The Minion results were close but mixed between LLVM/Clang and GCC.

OpenSSL continues to be well optimized for both compilers.

For most of these C/C++ benchmarks for the quick Subversion code comparison of LLVM/Clang vs. GCC, the GNU Compiler Collection continues to be the fastest performance. However, this weekend benchmarking was limited to just Intel's latest-generation Ivy Bridge hardware in a single configuration running Ubuntu Linux. When LLVM/Clang 3.2 and GCC 4.8 are closer to release, more extensive testing will be conducted -- along with looking at the compile-time performance, generated binary size, and other factors.