Once Campfire in Rust: one binary, the Rails app's data, 19–44× faster

A Rust port of ONCE Campfire achieves pixel-perfect parity with the original Rails application while delivering 20–95× faster performance. The single binary replaces Ruby, Puma, Redis, and Resque, handling 100,000 concurrent clients in 1.5 GB of memory and serving pages and real-time updates significantly faster than the Rails version.