Let’s discuss a technology that is getting a lot more attention lately: Node.js Training in Noida. has been the hottest technology in Noida. Node.js can be used by Microsoft, VMWare, and eBay as well as many other top tech companies. It is the perfect skill for anyone looking to make a career out of software development.
Node.js is a tool that allows you to create “real-time” and “highly scalable apps.” May sound familiar to you as JavaScript for the server side. You don’t know what Node.js actually is but still want to learn how and when to use it. Let me explain it all.
Let’s start at the beginning.
The Web is changing
The internet was once about consumption. Visiting web pages, viewing videos, and looking at photos of cats. Although the web is still primarily about cats, it has evolved to be more about interaction. People around the globe want to communicate with one another in real-time. Chat, gaming, and constant social media updates are all features that require real-time communication between clients, users, and servers around the internet. This real-time communication must be done on a large scale to support hundreds, thousands, and even millions of users.
What do software engineers need in order to make this possible? Real-time communication between clients/servers is essential. This means that we require persistent, fast I/O. Web developers who have worked with HTTP know that this is not the intended use case. It is extremely slow and inefficient to have many clients poll the server simultaneously. Servers must be able to push data to clients instead of using HTTP’s heavy request/response method to enable real-time communication. These lightweight push communications must be scalable, manageable, and easily adapted for software development.
Node.js
Node.js uses JavaScript to run JavaScript in an event-driven environment. Uses the V8 engine that Google developed for their Chrome web browser to run JavaScript. The node can leverage V8 to create a server-side environment that compiles JavaScript and executes it at lightning speed. V8 compiles JavaScript directly into native machine code and does not interpret or execute it as bytecode. This is the reason for the significant speed improvement. Node Training is an open-source, cross-platform program that runs on Mac OSX, Windows, and Linux.
JavaScript, however? What about the server side? Why? Although JavaScript was traditionally a web browser tool that did menial tasks, it is a fully functional programming language capable of doing anything more complex languages like C++. Ruby and Java are both Ruby. JavaScript also has an excellent event model that is ideal for asynchronous programming. JavaScript is a well-known language that millions of developers use every day. This reduces the learning curve for Node.js as most developers won’t need to learn a new language in order to build applications.
Asynchronous Programming Made Easy
The Event Loop is the true magic of Node.js Training. It not only executes JavaScript lightning fast, but it also makes JavaScript dash. All I/O intensive operations performed in Node.js asynchronously are used to scale up to large numbers of clients. Traditional threaded asynchronous code implementation is cumbersome. It creates non-trivial memory footprints for large clients. Each client spawns its own thread, which increases memory consumption. has an event loop that handles all asynchronous operations. This is to avoid inefficiency and the difficulties of programming threaded apps. An application that needs to perform a blocking operation, such as I/O operations or heavy computations, sends an event loop with a callback function and then continues execution of the rest. The event loop tracks the asynchronous operation and executes the callback function when it finishes. It then returns the results to the application. This makes it possible to manage many operations, such as client connections, and computations. The event loop can efficiently manage the thread pool, optimize task execution, and let you know when the callback has been completed. This makes it easy for developers to focus on their applications by leaving this responsibility to the event loop.