Home IT news Node.js and Java: The “fratricidal” fight

Node.js and Java: The “fratricidal” fight


It was 1995 that we saw Java first introduced. Then, not long after, JavaScript appeared in the tech world. At that time, the similar names of those often made people think they were “siblings”. However, the two programming languages couldn’t be more different. While Java code needs to be compiled, JavaScript code is all in the text. That’s only the beginning of the technical differences between them. The day since Node.js was spawned, it has been making us go nuts than ever before.

Everyone used to see Java as a revolution as it played a critically important role in Android mobile app development, enterprise computing and something like Blu-ray disks. Nowadays, we have been seeing another revolution thanks to the introduction of Node.js. The incredible speed of Node.js has been making developers’ heads spinning because JavaScript was often faster than Java and other options.

node js and Java
Performance Comparison: Java vs Node. Which wins?

The question is, can the speedy and flexible Node.js help Java continue to maintain its own position? Let’s find out the answer in this post.

Why is Node.js so fast?

node js so fast
Node.js Architecture | Codeburst

What is execution speed?

When talking about web-services, the speed of code execution in programming is so important because the execution speed is the prerequisite factor process request and send the response back to the client. That means developers need to optimise time spent on processing request, from opening the connection to the client receiving the response.

node js server

Let’s take a look at the following diagram of what’s going on in Node.js server to process the requests. When you compare it to the multi-threaded server processing diagram, you will understand why Node.js is so fast:

What makes Node.js so fast?

  • The single thread mechanism and asynchronous programming. NodeJs operate asynchronously and uses the Event-loop mechanism to function. When every I/O operation doesn’t block other operations, it allows you to read files, send emails, query the database, etc… at the same time.
  • A Node.js process is running at all times and listens to connections. It makes the time processing reduced.
  • The code optimisation of virtual machine in Node.js (V8). V8 has two types of compilers, which are “full” compiler and “crankshaft” compiler to optimise code and replace the old unoptimised code, which continues improving execution speed considerably.

Node.js vs Java: Which one wins?

Thanks to its 20-year development, Java was considered the best programming language for a long time before Node.js appeared. It provides developers with great code maintainability and incredible computation efficiency. The coin has two sides. Developing Java applications needs much more time than Node.js does. The problem arises from not only slow development process but also code migration.

Meanwhile, Node.js provides fast development as the frameworks can do a heavy workload, which allows projects to be quickly compiled. However, Java is still a younger programming language than Java. In some cases, it can not replace Java – the language has been efficiently used for years.

Node.js is the best choice for web applications, mobile apps, real-time applications, online gaming apps etc.

To sum up, it seems better to pick Node.js for your web application development for its scalability and speed. The high performance of Node.js can play an important role in rapid application modernisation projects and IoT solutions.