The Clang test was unsuccessful with the Gcrypt library, but the LLVM-GCC number shows it performing at the same pace as GCC 4.5.0.
LLVM-GCC was running well with the multi-threaded C-Ray ray-tracing engine, which was very close to being the compiler that delivered the best numbers. However, Clang was running about 4% slower than GCC 4.5.0, but still it was faster than GCC 4.4.0.
LLVM-GCC and Clang exhibited some nice performance boosts with their Dhrystone 2 performance via the BYTE Unix Benchmark. While a synthetic test, LLVM-GCC was 43% faster than GCC 4.5.0 and Clang was 28% faster than this newest version of the GNU Compiler Collection.