select

select is a multiplexing system call in Linux used for monitoring multiple file descriptors to check if they are ready for I/O operations. It is commonly used in server-side game development for handling multiple connections asynchronously. However, select has limitations, as it scans all file descriptors linearly, making it inefficient for handling a large number of concurrent connections. Despite its drawbacks, it remains useful for simpler applications or legacy systems. Modern alternatives like epoll or kqueue offer better performance and scalability.