Build a Fast GeoIP API in Rust with ntex

This article shows a step by step approach to building a small, high performance GeoIP HTTP API in Rust using ntex . In less than 120 lines of code. Why ntex? Runtime choice: ntex separates framework from the async runtime, letting you select implementations that best fit your latency and platform requirements. Ecosystem: ntex has runtime-consistent crates such as ntex-redis , ntex-grpc , ntex-mqtt , and ntex-amqp so you can add integrations that match the same runtime model. Low overhead: ntex aims for high-throughput servers and gives control over worker count and threading. Prerequisites Rust toolchain (stable). Install from https://rustup.rs if needed. cargo available on PATH. MaxMind mmdb files placed under ./mmdb available here Install dependencies Run these commands to add the dependencies used in this example. Each is chosen to fulfill a specific role: ntex - the web framework. maxminddb - reading MaxMind DB formats. memmap2 - memory map mmdb files for fast, zero-copy reads. lr