One of the biggest advantage of NodeJs is its execution speed. What is Execution Speed? Execution speed could be anything between Fibonacci sequence to querying database. In web services, execution speed holds significance as it helps process request and send the response back to the client. If you grab it, execution speed is starting from opening a connection to the client receiving the response. Here are amazing advantages of node.js outsourcing: 1. NodeJs is asynchronous and single-threaded. As a result of this, it's I/O operations doesn't block another operation. It helps reading files, send emails, a query to the database, etc. in the meantime. 2. Web server request in Nodejs does not create a separate NodeJS process. Even one NodejS process run at all times and also listens to connections. In the process, the main thread is executed using Javascript, and I/O operations on the other hands are executed in separate threads that ensure no delays.