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The JavaScript Workshop
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Node.js has an event-driven architecture that is capable of processing requests asynchronously. Node.js has a single-threaded architecture. Traditional servers had multi-threaded architectures and they spawned a new thread as soon as a new request landed, but Node.js handles everything on a single thread. You may wonder how a single-threaded Node.js handles millions of requests. Well, the answer is the event loop. JavaScript works on a single thread and handles async operations thanks to its event-loop architecture. Any request that is taking a long time is sent to the background and the next request is addressed and processed. Before proceeding, let's understand the difference between synchronous and asynchronous processing.
If the execution of a program takes place in a linear sequence, it is synchronous processing. For example, in the following code block, an entire line will be read and executed before the process moves to the...