The Spectre Mitigation Performance Impact On AMD Ryzen 5000 "Zen 3" Processors

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The Spectre Mitigation Performance Impact On AMD Ryzen 5000 "Zen 3" Processors: For those wondering what the current cost is to the default Spectre mitigation protections on the new AMD Ryzen 5000 series "Zen 3" processors, here are a set of performance tests looking at that overhead with the still relevant mitigations applied by default and then if forcing them off. The Zen 3 mitigation overhead was compared then to similar AMD Zen 2 and Zen+ processors.