Mailing the story:
LLVM Clang 3.4 Compiler Performance Is Doing Good
For this weekend benchmarking of LLVM/Clang 3.4, testing is just being done from a single system and comparing just the LLVM/Clang/Compiler-RT 3.3 release against a SVN snapshot of the LLVM 3.4 branch with Clang and Compiler-RT. When LLVM 3.4 is officially declared as stable, more benchmarks will be coming on Phoronix and reference compiler performance benchmarks against GCC, etc. It's a cycle that comes every six months at Phoronix with major LLVM updates.