LLVM/Clang vs. GCC On The ARM Cortex-A15 Preview

The tested GCC 4.8 development code is slower than GCC 4.7.2 but at the same speed as GCC 4.6.3. Meanwhile, LLVM/Clang 3.0 was the slowest compiler tested on the Cortex-A15 with its performance coming in several seconds behind the Free Software Foundation's compiler.

For MrBayes there wasn't much change on the GCC side but LLVM/Clang 3.0 was significantly slower on this ARMv7 platform.

With C-Ray there is a very well known performance boost between GCC 4.6 and GCC 4.7. The performance with GCC 4.8 on the ARM Cortex-A15 was unchanged. Meanwhile, LLVM/Clang 3.0 was slower than the three tested GCC releases.