Upon closer inspection, we found that the so-called MySQL query benchmark test is using a specific internal MySQL function and is heavily biased in favour of the AMD architecture. Since not all real-world processes are affected in the same way, this benchmark has its own limitations when comparing Intel servers to AMD servers. To establish the actual degree of the bias, we have carried out a cross-comparison of results measured using WPPerformanceTester plugin, WPBenchmark
plugin, and original Benchmark.php script. Kevin Ohashi adapted this script for his WPPerformanceTester plugin. Authors of the script have changed specific MySQL function used by the test in 2019. Kevin has ignored this change. The results of the WPPerformanceTester plugin’s MySQL query test are shown below in comparison to the aggregate CPU benchmark, which is the result of averaging three independent benchmarks.