Blocking vs Non Blocking - Node JS || Hindi || Coding Scenes #13

In Node.js, blocking and non-blocking refer to the way that JavaScript code is executed and how it interacts with I/O operations.

Blocking: Blocking refers to a blocking I/O model, where JavaScript code execution is blocked or stopped until an I/O operation is completed. This means that the code waits for the I/O operation to complete before it can continue executing. In a blocking I/O model, if there are many I/O operations, the overall performance can be negatively impacted because the code is blocked for long periods of time.

Non-Blocking: Non-blocking refers to a non-blocking I/O model, where JavaScript code execution is not blocked by I/O operations. Instead, I/O operations are executed asynchronously in the background, and the code continues to execute while the I/O operation is in progress. When the I/O operation is completed, a callback function is executed to handle the result. In a non-blocking I/O model, multiple I/O operations can be executed concurrently, improving overall performance and scalability.

Node.js uses a non-blocking I/O model, which makes it an efficient runtime for building scalable and high-performance applications that handle a large number of I/O operations. The event loop and non-blocking I/O model are two of the key features that make Node.js well-suited for building real-time, event-driven applications.

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