Non-blocking I/O

Non-blocking I/O is a way computers handle multiple tasks efficiently by allowing programs to request data or resources without waiting for each operation to complete before moving on. Instead of pausing everything until data is ready—like waiting in line for service—the program continues executing other tasks. When the data becomes available, it is processed asynchronously. This approach improves performance and responsiveness, especially in network or large-scale applications, by preventing delays caused by waiting for slow operations and enabling the system to manage many tasks concurrently.