Coroutine

Coroutines are lightweight, cooperative multitasking constructs that enable efficient asynchronous programming in server-side game development. Unlike traditional threads, coroutines allow functions to be paused and resumed without blocking the entire execution thread, making them ideal for handling game logic, networking, and AI behavior with minimal overhead. They work seamlessly with future & promise mechanisms, simplifying concurrency management by avoiding callback hell and reducing synchronization complexity. Coroutines are widely supported in modern languages like C++ (via std::coroutine), Python (asyncio), and Kotlin, offering game developers an efficient way to write non-blocking code while maintaining readability and performance.