I run a public transport website that includes a few mobile apps. I've broken it down into quite a few microservices, but the bulk of it runs on Node and JVM.

I run a public transport website that includes a few mobile apps. I've broken it down into quite a few microservices, but the bulk of it runs on Node and JVM. I have a 64GB RAM, 12 core server, and the JVM services take up about 25% of resident RAM (ignoring Kafka and other Java stuff). I've wanted to learn Rust for a while, so I recently bit the bullet. I use gRPC everywhere (Dart/Flutter, Node, JVM, Python), so I decided to start by rewriting some small services in Rust using gRPC for comms. For now, I've taken a Java service that used 500MB at peak, to under 10MB RAM. I'm planning on eating into the big stuff over the coming months. It's not making money, so it's a "hobby" yes. Consulting's paying the bills so I don't mind at this point. EDIT: E.g. here's an url shortener gRPC server that runs on NodeJS, and a Rust client that can shorten urls and get results back. https://github.com/MovingGauteng/shorty https://github.com/MovingGauteng/shorty https://github.com/MovingGauteng/rust-grpc-shorty https://github.com/MovingGauteng/rust-grpc-shorty