Why is nodejs rarely used?

Node.js is a popular open source software built on Google's V8 engine that can run JavaScript code on the server side. Although Node.js has slowly become popular in the JavaScript community, in actual development, few people choose to use it to develop server-side applications. So, why is Node.js used less?

1. Performance issues caused by Node.js process mode

Node.js is single-threaded, which means that the application only runs on one CPU core. This makes Node.js perform poorly when handling a large number of concurrent requests. For multi-core servers, this problem is very serious. Although Node.js allows the creation of multiple child processes through the child_process module, this model results in excessive memory usage and is not easy to manage.

2. The Node.js ecosystem is smaller than other languages

Compared with Java, PHP or Python, the Node.js ecosystem is relatively small. This means that developers may need to write many of their own tools or rely on third-party libraries when using Node.js. And because the Node.js ecosystem is relatively new, developers may encounter immature libraries or tools when solving problems.

3. Asynchronous programming is relatively complex

The asynchronous programming model of Node.js is very useful in most situations, but it may feel complicated and obscure for novice developers. If developers don't have enough experience or training, they may get lost in callback functions and event loops and fail to find errors in the program or debug problems in time.

4. Security Issues

When developing applications using Node.js, security may become an issue. Because Node.js itself is a relatively new technology, many people may not yet be familiar with how to protect their code and prevent vulnerabilities in their code. In addition to this, since JavaScript is a difficult language to debug, developers may overlook certain security issues that require attention.

5. Lack of professional developers

Although the Node.js community is growing, the number of professional Node.js developers is still relatively small compared to other languages. This means more time and effort in hiring and training when developing applications with Node.js.

6. Other issues

In addition to the above reasons, there are other issues that may cause Node.js to be less used in actual application development. For example, Node.js's module system is relatively loose, which can easily lead to problems with different versions of the application. In addition, Node.js has limited scalability and is difficult to support specific hardware or software environments. These issues may lead developers to avoid Node.js when choosing a technology stack.

In short, although Node.js has been relatively mature in the JavaScript community and has a large community, it still has many problems in actual application development. While the community is continually working to address these issues, more time and investment may be needed to make Node.js a better choice in the coming period.

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