GCC 11 Compiler Performance Benchmarks With Various Optimization Levels, LTO
Those are the fresh numbers from this GCC 11 compiler optimization reference benchmarking on this Core i9 11900K desktop with Fedora Workstation 33.
If taking the geometric mean of all 43 diverse benchmarks ran in full (see this OpenBenchmarking.org result file for all 43 tests individually), above is the outcome. With these tests, when going from a plain -O2 to -O3 netted just a 3% improvement for the applications benchmarked. As the next installment, for those wondering about GCC 11 PGO performance those fresh profile-guided optimization benchmarks are currently being carried out.
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