We detected a regression on the Connection Close HTTPS scenario, which hits Plaintext with "Connection: Close" header in order to simulate an https handshake.

The regression is only Linux, and is due to updating an expired self-signed test certificate to a valid one.

Note that these results are identical on both net5.0 and net6.0. We then measured the same scenario on NodeJS, with both certificates, and got identical results of 20,000 RPS.

We took traces for Linux on net6.0 that are available here (nettrace format):

• with valid cert
• with expired cert