Understanding Node.js, the Event Loop and the Safe Use of Singletons

Node.js efficiently handles high concurrency using a single-threaded event loop and asynchronous operations. It can process millions of requests simultaneously by offloading time-consuming tasks to background threads. Safe singleton patterns are demonstrated, along with solutions for common pitfalls like blocking I/O and shared mutable state. The article emphasizes the importance of non-blocking, stateless code for optimal Node.js performance.