- November 06, 2020 4:43 pm
- by Admin
According to a recent survey, 60% of high-profile enterprises (even NASA) around the world rely on Node.js. Multi Billion Companies such as PayPal, Uber, eBay, and many other enterprises around the world hire Node.js developers for building powerful backends for their enterprise apps.
Because of the non-blocking or asynchronous nature of Node, apps that are made using Node.js are highly scalable. You must be now wondering what asynchronous architecture is all about. We will dive into that below:
Before diving into asynchronous architecture, let’s talk about synchronous architecture. The latter uses multiple threads to handle multiple requests, uses blocking I/O calls. Applications built with frameworks such as ASP.NET use this architecture by default. In synchronous architecture, app threads that are assigned to serve a client can’t be used to serve another client. A new thread is spawned to serve another client with every request. If we have a large number of concurrent clients in the event loop, we will run out of threads to serve these clients. This takes up system RAM and max-outs the amount of RAM available. The only solution that we can do to evade this situation is to add more hardware.
In contrast to blocking or synchronous architecture, Node.js uses a single-threaded, event-driven architecture. This architecture on the other hand allocates a single thread to handle multiple requests. This means, If you want to query a database, your thread doesn’t have to wait for the database to return the data. While the database is executing your query, that same thread will be used to serve another client which is not the case with synchronous architecture. This allows applications built with Node.js to support hundreds of thousands of concurrent connections held in the event loop.
Asynchronous architecture of Node.js allows it to remain as a lightweight and highly performant run time in data-intensive real-time applications. Hence it can be used to build highly scalable and fast network applications.
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