Building The Linux Kernel With LLVM's Clang Yields Comparable Performance
With the CPU-bound tasks, the performance for the most part was close between the vanilla Linux 3.14.0 kernel built by GCC 4.8.2 and the LLVMLinux 3.14 kernel built by Clang 3.5. In a few tests there were very minor performance differences, but overall when the kernel was configured the same, the performance of these particular benchmarks were close with no immediate performance difference when building the Linux kernel with Clang as opposed to GCC.
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