Continuous Test Orchestration And Execution Platform Online

Perform automated and live-interactive testing on 3000+ real desktop and mobile devices online.

How to Check the Website Loading Speed?

Once a web application or any new element of a webpage is developed, it doesn't means it is ready to deploy. Checking the website's functionality, performance, and load speed are essential. According to one survey, 1 out of 4 users left a webpage if it takes more than 4 seconds to load.

Key metrics for checking website load speed:

  • Time to first byte (TTFB): This metric calculates the time it takes for a user to request a page and for the first byte of data to arrive from the server. A low TTFB shows that the server is processing requests rapidly.
  • Document complete: This indicator gauges how long it takes for a page's entire content to load and be shown in the browser. A speedy page load is indicated by a low Document Complete time.
  • Fully loaded time: This indicator gauges how long a page's resources, such as graphics and scripts, can fully load. The page loads rapidly if the Fully Loaded time is low.
  • Speed index: This evaluates how visually complete a web page is as it loads. It's a way to gauge how quickly a page's visible information is filled in. Lesser values are preferable.
  • Page size: The entire amount of data that must be downloaded to display a page in a browser is called page size. Because a larger page will take longer to load, optimizing pictures, cutting down on requests, and using as little extra code as possible are crucial.
  • How Fast is My Website?

Now you are well aware of what kind of metrics you need to keep in mind while testing your website loading speed. You can follow the steps mentioned below to check the webpage loading speed

  • Use website performance monitoring tools: Various free online resources can evaluate how quickly webpage loads, including GTmetrix, Google PageSpeed Insights, and WebPageTest. These tools offer ideas for improving the page's performance and extensive information on the page's load time, including the time to first byte (TTFB) and the completely loaded time.
  • Cross-browser testing: It's crucial to test the page on several devices and browsers to ensure that it loads quickly for all users because different devices and browsers may have varying performance characteristics. Sometimes some webpage elements are not browser compatible, affecting page load speed. You can perform cross browser testing on the LambdaTest cloud-based platform, where you can test your webpage on 3000+ browsers, OS, and devices.
  • Check page codes and resources:Examine the page's code and resources to find any problems that might be causing the load time to be too long. This might entail picture optimization, a decrease in queries, and reducing the use of extraneous code.
  • Monitor page performance: Check the page's performance frequently to ensure that it keeps loading rapidly, even as the content or features of the page change.
  • page.bringToFront: Function used for bringing specific windows or tabs to the front.
  • page.bringToFront: Function used for bringing specific windows or tabs to the front.

You should also use extensions to track your page load speed, google analytics for checking the website's performance, and how users are iterating with your web pages.


Test your websites, web-apps or mobile apps seamlessly with LambdaTest.

Start Free Testing

Earn resume-worthy Selenium certifications that help you land a top job.

Learn More

Test your web or mobile apps

Test orchestration and execution cloud of 3000+ browsers and OS


24/7 support


Enterprise grade security


Fastest test execution cloud