The state of SSL stacks:
https://www.haproxy.com/blog/state-of-ssl-stacks
The SSL landscape has shifted dramatically. In this paper, we examine OpenSSL 3.x, BoringSSL, LibreSSL, WolfSSL, and AWS-LC with HAProxy.
as the site is asleep, I'll offer the tldr: aws-lc is the fastest, wolfssl is number two, openssl is not very fast
but read the post later, it is super long and detailed