How Redis Handles Thousands of Connections Without Multithreading

Redis demonstrates that multithreading is unnecessary for handling concurrent I/O; instead, it uses event-driven architecture with I/O multiplexing to efficiently monitor thousands of connections in a single thread. By avoiding thread creation and context-switching overhead, Redis achieves superior performance and minimal memory footprint compared to traditional multithreaded approaches. Understanding this design pattern is essential for anyone building scalable, high-performance systems.