Both are CPU bound on de-serialization. It’s basically DB replication over HTTP plus some business logic at either end. The Sinatra version is built in a weeken

Both are CPU bound on de-serialization. It’s basically DB replication over HTTP plus some business logic at either end. The Sinatra version is built in a weekend which is 5x slower has authentication and does use ActiveRecord. Building an entire web app, with background job processing, in Rust with the ecosystem how it is at the moment is very, very slow compared to Ruby, Sinatra and Sidekiq. When we started Diesel couldn’t join to more than one table. Probably approaching 5x in development time. It’s just not mature enough yet. We’re still experiencing stuck threads which don’t timeout. Sounds like you found a great case for a native extension!