Scaling Localhost: Building Serverless Exit-Nodes for High-Throughput
IT InstaTunnel Team Published by our engineering team Scaling Localhost: Building Serverless Exit-Nodes for High-Throughput Development Your laptop cannot handle 10,000 concurrent users. Whether you are running a high-performance Rust backend or a heavy Django monolith, the physical constraints of your local CPU, RAM, and home or office bandwidth create a hard ceiling. But what if your development environment did not have to be the bottleneck? The boundary between “local” and “cloud” is dissolving faster than most developers realise. We are no longer limited to simple tunnels like ngrok or Localtunnel, which act as dumb pipes forwarding traffic one connection at a time. Instead, a new architectural pattern is emerging: edge-tunneling . By pairing a serverless reverse proxy with a fleet of globally distributed exit-nodes, you can simulate, test, and even serve production-grade traffic directly from your local machine. This guide covers how to think about — and build — a serverless...