What Are WebSockets?

WebSockets provide a persistent, full-duplex connection between the client and the server. Once the connection is established, both sides can send data at any time without re-opening new HTTP requests. This makes WebSockets ideal for real-time features such as chat applications, stock tickers, multiplayer games, or live dashboards.

For example, in a real-time trading app, updates can be delivered to thousands of users simultaneously using a single WebSocket channel — handling around 10,000+ concurrent connections per server efficiently when configured properly.

What Is AJAX?

AJAX (Asynchronous JavaScript and XML) is a web development technique that allows browsers to send and receive data from the server asynchronously, without reloading the entire page. It typically uses the HTTP protocol to fetch JSON or XML responses and update parts of the page dynamically.

AJAX is perfect for forms, content updates, or small data requests — such as updating a shopping cart or loading new products without refreshing the page. For example, a simple AJAX call might request 500 KB of JSON data every few seconds, which is lightweight and works well for moderate traffic applications.

Advantages and Disadvantages

When Should You Use AJAX or WebSockets?

Choosing between AJAX and WebSockets depends on how interactive or time-sensitive your application is:

• Use AJAX when you only need to update data occasionally — for example, submitting a form, loading a list, or saving user preferences.
• Use WebSockets when your application needs continuous communication — such as chat rooms, live scores, or collaborative tools where every millisecond matters.

A common hybrid approach is to combine both: use WebSockets for real-time notifications and AJAX for structured API data, balancing performance and simplicity.

Server Requirements

AJAX works with almost any web server, including Apache, Nginx, and IIS. Since it uses standard HTTP requests, no special configuration is needed beyond enabling HTTPS for secure data transfer.

WebSockets require a server capable of maintaining open TCP connections. Modern web servers like Nginx, Node.js, and Ratchet for PHP support WebSocket protocols natively or through extensions. You’ll also need to ensure the hosting environment allows persistent connections — something many shared hosting plans do not.

Common Technologies for WebSockets

• PHP: Ratchet, Swoole, or Workerman frameworks provide efficient WebSocket servers.
• Node.js: Libraries such as Socket.IO or ws are widely used for scalable real-time applications.
• Python: Tornado and FastAPI support WebSocket protocols natively.
• Java: Spring Boot and Jetty both support real-time communication.

When using PHP for WebSockets, a lightweight solution like Ratchet can handle up to 5,000 simultaneous users on a single server, depending on hardware and connection intervals.

Custom Web Development

If you’re building a mobile or web app that requires smart data handling or real-time features, consider working with a professional team. A well-designed system balances AJAX for structured requests and WebSockets for live data.

Explore expert solutions for your next project at Superior Web Solutuions’ Custom Web Development .