Secondly, human communication doesn't follow a set of rules like a programming language. For instance, I don't have to reply to your text before you send me another. It's nonlinear and chaotic. Node.js has embraced this same asynchronous method. It uses the Event Loop to ensure data is simply transmitted when it exists and isn’t constantly being queried for, a lot like a holding cell for communication. Here, while the Event Loop is taking care of asynchronous tasks, Node.js can let go of the heavy lifting and continue running the program as usual. This makes Node.js great at idling when there’s nothing to do, instead of constantly querying for more information. The speed, along with asynchronous programming, are the twin powerhouses that make Node.js so responsive.
It helps with concurrent request handling. Due to its asynchronous non-blocking way of handling code execution, even though Node.js runs on a single thread with event looping, it can handle more requests than, for example, Apache HTTP server. Here, the API calls do not wait and block the other calls. It can handle more than one request at a time.
Thanks to the event mechanism of Node.js it allows you to write highly scalable networked apps.
The Node Package Manager handles the installation and updating of reusable modules from the online collection, along with the version and dependency management of reusable modules. NPM works a lot like Ruby Gems.
You get to code in the same language, both on the server side and on the front end. We're all used to using multiple programming languages in most of our projects. Even so, managing code in the same language on the server-side and the front-end can save you a lot of time when it comes to debugging.
Without using up much memory, real time communication is managed by the event loop. This way developers can spend more time working on the functionality of the app rather than worry about the app getting clogged with too many queries.
Node.js is well instrumented for production usage, meaning it comes equipped with tools to help you bring your application to complete production readiness and performance.
Node.js being single-threaded means one does not need to care about the problems of synchronizing between threads or shared mutable state. However, it also means unlike preemptive concurrency, the programmers themselves have to decide how to deal with concurrency, the default being no concurrency at all.
It doesn't work well with CPU-intensive tasks. Node.js is suited more for I/O stuff, like the web server.
Where Node shines is in building fast, scalable network applications. It's easy to get started, and it's built well enough to handle modern Web complexities. Node.js is a runtime system that could very well work for you if you're building your next generation Web site, especially APIs for mobile and Web integration, or if you are creating something new which relies on underlying services itself.
Nevertheless, each technology comes with its own pros and cons. Node.js isn’t perfect for every project, but it's great for many web solutions.