9 Ways to Improve Node.js Performance


Performance is a key part of making a website or web app. Users, writers, and business people will all be happier with an app that starts quickly than one that takes a long time. 

Node JS can help reduce the loading time by 50-60%. In this article, we’ll talk about some rules you should follow when adding more space to your Node.js servers. Then, your computers will be able to handle lots of users without hurting the end-user experience. 

If you follow the tried-and-true tips in this article, your product will be faster and work better than the competition:

  1. Track and describe your program 

To understand speed as a whole, you must measure and watch the Node.js performance of your current Node program.

Once you know how well your web app is doing, it’s easy to optimize it for speed. Scalability testing could help all kinds of businesses grow and move into new markets. Using this testing, you can find and fix errors and problems that make it hard for your web app to grow.

  • Getting rid of uneven loads

A common problem is making apps that work well even when they get a lot of requests at once. Load balancing is often done by spreading the data out over many lines. Load balancing is the name for this method.

You can handle multiple links because Node.js lets you make a copy of your app. This can done by a single multicore computer or a group of machines.

With the new cluster module, a Node.js program can grow on a server with multiple CPU cores by creating many processes (called “workers”) for each available CPU core. These workers talk to a single master process and use the same server port.

This means it works as if it were a single Node.js server with a lot of cores. In a machine with multiple CPU cores, the cluster module can round-robin spread new links to all workers. This makes load sharing easier.

You could also use the PM2 process scheduler to keep apps running forever. By restarting the script every time a mistake or change is made to the code, downtime is avoided. You don’t have to change the code to use the native cluster module because PM2 has a cluster feature that lets you run multiple tasks on all cores.

There are problems with using a single cluster, so plans should be made to move from a single-server architecture to a multi-server architecture using reverse proxy load sharing.

  • Improving how data is processed

Optimisation is a key part of speed because it simplifies system processes and improves the general efficiency of an application. How may a Node.js script made better?

After using Node JS for more than 2 years, companies have reduced their development costs by 12%.

Start by looking at the method for handling data. 

Node.js apps might be slow because they are doing a CPU/IO-bound job, like a database query or a long API call. Most Node.js apps make calls to APIs and wait for replies to find out what they want to know.

  • Use caching to reduce wait times

One of the most common ways to speed up a website is to use server-side caching. The main goal is to speed up data recovery by cutting down on the time spent on I/O (like getting data over the network or from a database) and math.

A cache is a layer of fast memory used to quickly store data that is often used. Most people only use primary sources of information when they have to.

Caching is a good idea for info that doesn’t change very often. If your application is often asked for the same data that hasn’t changed, caching will almost certainly make it faster.

You can also store the results of jobs that take a lot of processing power as long as the cache can be used for other questions. This keeps computers from having to do the same calculations over and over again, which saves time and money.

API calls to other systems are often good options for caching. The answers are thought to be useful for more than one query. It makes sense to cache API calls because it keeps you from having to make an extra network request and pay any other fees that come with the problematic API.

Using an in-process caching option like node-cache makes it easy to implement caching in a Node.js program. Part of the process is keeping often-used info in memory.

Since an in-process cache is tied to a single application process, it is not the best choice for global processes (especially when saving things that can change).

In this case, a global caching system, such as Redis or Memcached, could be used. These tasks run at the same time as an application, but they work best when the application is spread out over several computers.

With SSL/TLS and HTTP/2, 5 Node.js apps can use HTTP/2 to speed up the web while slowing down the rate at which data is transferred. The goal of HTTP/2 is to fix problems with the older HTTP/1.x standard and make it run faster.

  • Take Breaks

With timeouts in Node.js apps, it’s easy to make a mistake. It’s likely that your computer is talking to third-party services, and some of those services may also be talking to others.

Even if just one of the services your customers depend on is unstable or takes too long to react, they will have a bad time. Even if you don’t run into this problem during development, you can’t always count on your partners to respond as quickly as they usually do. This is why timeouts are important for node.js development company.

A stop tells how long a request has to wait before it is turned down. It shows how long a customer is willing to wait for a service to respond before giving up on it. If the application doesn’t hear back within the time limit, the link will end.

Since the default timeout in many popular Node.js tools for making HTTP calls, like Axios, is infinite, any external API could make your app wait forever for the data it needs. 

Read timeouts are almost always much longer than communication timeouts. Clients can connect to a different server or API if one takes too long to accept a link. After the link has been approved, the computer will have enough time to answer.

Before deciding on a pause value, you can use specific tools to keep track of the timestamps of your API searches and the reaction times of the APIs you connect to. This will give you the information you need to make smart choices about any third-party services your app needs. For important services, you also need a restart plan to deal with temporary slowdowns.

  • Safe Client-Side Authentication

For most online apps to give users a unique experience, they need to keep track of the state. If your website lets users log in, you’ll need to keep track of their sessions.

When you use stateful verification, you usually make a random session number so that the server can keep track of session information. To grow a stateful solution to a load-balanced application on multiple servers, you can use a unified storage solution like Redis to store session data or the IP hash method to make sure that the user always goes to the same web server.

Being so brave does have its costs, though. For example, all users would be harmed if work had to be done on a single computer.

Another flexible choice is to use JWT for stateless verification. The benefit is that information is always available, no matter what system is handling a user’s request at the time.

In a normal JWT application, when a person signs in, a token is made. This key is a JSON object with the appropriate user info that has been stored in base64. Tokens are sent to clients so they can use them to log in to APIs.

  • Use WebSockets to connect to the server

HTTP’s request-and-response system has long been the foundation of how the Internet works. WebSockets replace HTTP in web apps that need to talk back and forth. They make it possible for the client and server to keep talking back and forth.

HTTP is the best way to send data with the least amount of human interaction and conversation driven by the client. WebSockets let the server send a message to the client in real-time without the client having to ask for it specifically.

This is a great choice for both short and long-term talks. Many writers use the ws package for Node.js because it makes it easy to set up a WebSockets server. The front end connects to a WebSockets-enabled server using JavaScript and gets event alerts.

Web Sockets allow for a high-competition design with a low cost to speed, which is needed to keep a lot of links open at the same time.

  • Clustering to increase throughput

Using the clustering method, a Node.js server can grown horizontally on a single machine. This is done by starting several child processes (workers) that run in parallel and share a single port.

Distributing new connections among all available worker processes is a common way to make the most of available CPU cores and reduce downtime, slowdowns, and failures.

Use the PM2 process manager to take better care of Node.js groups. There are also other tools that can help your employees track and improve their processes.

  • Avoid Sessions and Cookies in APIs, and Send Only Data in the API Response

To keep data on the server temporarily, you may use cookies and sessions. The servers are quite expensive. These days, most APIs are stateless and support various token and authorization schemes like JWT and OAuth. Client-side storage of these authentication tokens safeguards the servers’ ability to maintain their state.

Tokens issued in JSON format (JWT) use for API authentication. Once a JWT delivered, it no longer be altered. Instead of encryption, JWT only uses serialization. OAuth is an open standard for authorization and not an application programming interface or a service. The OAuth protocol is a standardized method of acquiring a token.

You shouldn’t bother setting up a static file service on your Node.js server either. If you need a web server, skip Node and go with NGINX or Apache instead.

When developing APIs with Node, it’s best practice to avoid returning a whole HTML page in the response. When the API just sends data, it improves the performance of Node servers. This kind of software often uses JSON documents.


We looked at a number of ways you can make your Node.js project more scalable in this post. Before applying an improvement, it’s important to do thorough speed tests on your system and base your choice on the results. With the help of observability/monitoring tools, you can see how your changes work and find regressions quickly and accurately.

Leave a Reply

Your email address will not be published. Required fields are marked *