Cloudflare released an article Making the WAF 40% faster about optimization of their Web Application Firewall (WAF), focusing on the transition from PCRE to RE2.
The last section, "Next Steps" says:
... we are currently porting it to use the same engine powering Firewall Rules. It is based on our open-sourced wirefilter execution engine ...
This means that customers may soon be able to write Rust to run at Cloudflare's edge that can use both HTTP request filtering and Wireshark-like filtering. The Wireshark part is in Cloudflares github:
Pretty exciting to see more Rust at the edge!