Pros of using Node.js
Easy to Learn
Freedom in Building Apps
While Ruby on Rails is a framework that imposes rules and guidelines of developing software in a particular way, Node.js gives you much more space and freedom in doing it your own way. Node.js is completely unopinionated, meaning you start building everything from scratch. It can execute basic tasks, but gives you only the bare minimum from a fresh install, making it less restricted.
Simultaneous Request Handling
Node.js provides the non-blocking IO system that lets you process numerous requests concurrently. The system makes simultaneous request handling much better than in other languages like Ruby or Python. Incoming requests are queued up and executed sequentially in a fast manner. In effect your app will take up much less system RAM, achieve high scalability levels and in a result will perform faster.
Cons of using Node.js
One of the biggest disadvantages of Node.js is that it lacks consistency. Node.js’ API changes frequently, and the changes are often backward-incompatible. When this happens, programmers are forced to make changes to the existing code base to make it compatible with the latest version of the Node.js API.
More Development Time
The fact that Node.js is unopinionated can also be seen as a drawback by some developers. Ruby on Rails provides you with a lot of directions from a fresh install and guides you into their way of doing things, but with Node.js you basically need to write everything from scratch. It might result in a decrease in productivity, slowing your work down. However, if you cooperate with an experienced team of programmers who have internally developed a good processes for developing and maintaining code, you do not have to worry about efficiency.
Not Suitable for Heavy-Computing Apps
Node.js doesn’t support multi-threaded programming yet. It is able to serve way more complicated applications than Ruby, but it’s not suitable for performing long-running calculations. Heavy computations block the incoming requests, which can lead to decrease of performance . While Node.js is perfect for complex apps, in the case of software which requires some heavy-computing it might perform less effectively.
Immaturity of Tools
Even though, the core Node.js is stable, many packages in the npm registry (pre-installed node package manager that organises the installation and management of third-party Node.js programs) are still of poor quality or have not been properly documented. As it is mostly an open source ecosystem, numerous tools have not been supervised and so they might lack the quality and fail at meeting coding standards. The npm’s structure makes it harder to spot reliable packages. Therefore, you might need more experienced developers who can find tools that can be trusted.