GCC vs. Clang Benchmark Comparison At Varying Optimization Levels: Last week I posted various LLVM Clang and GCC compiler benchmarks using packages available on Ubuntu 16.04 LTS and with the testing from a Xeon Skylake system. Today are some complementary tests when benchmarking GCC 5.3.1 and LLVM Clang 3.8 while testing each compiler with a variety of different optimization levels.

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