[stunnel-users] "perf.html" Performance Benchmark Details Needed

Hi all. On the stunnel home page, https://www.stunnel.org/perf.html, the published benchmark claims that stunnel reaches 9-10 Gbps iperf3 throughput on a single flow on AMD Ryzen 9 7900. It also says,

The benchmark framework records every sample and the complete software environment so future stunnel and OpenSSL releases can be compared using the same procedure

However, I was unable to find this benchmark framework, which I wanted to use to retest stunnel's performance on different systems under the same condition. I was not able to test this framework in the "tests/" directory of the repository. Where can I find more information about the benchmark? Or, when will this benchmark framework be published? Thanks, Tom Li