GCC 10 vs. Clang 10 Compiler Performance On AMD Zen 2 + Intel Cascade Lake

We delivered many benchmarks of Clang 10.0 on various CPUs following that updated LLVM compiler stack release earlier this year. With GCC 10 released earlier this month, we have begun our benchmarking of this annual feature release to the GNU Compiler Collection. First up is a look at the GCC 9 vs. GCC 10 vs. LLVM Clang 10 compiler performance on AMD Zen 2 and Intel Cascade Lake systems.
This initial round of benchmarking for GCC 10 vs. Clang 10 is looking at the release builds of each plus GCC 9.3 when testing on AMD Ryzen Threadripper 3990X and Intel Core i9 10980XE workstations. The Threadripper 3990X is running out of the System76 Thelio Major. Both systems were running Ubuntu 20.04 LTS with the Linux 5.4 kernel and all the compilers were built in the same release mode manner. There are RAM/SSD differences between the systems with not intending to compare the AMD vs. Intel performance but rather looking at how these LLVM Clang and GCC compilers are performing across multiple CPU families. Additional CPU benchmarks will be forthcoming with these compilers.
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