First Input Delay: How to Boost Your FID Score


In today’s digital age, website performance has become increasingly important. Website users expect websites to load quickly and be easy to use. As a result, Google has introduced a new metric called First Input Delay (FID) to measure website performance. FID measures the time it takes for a website to respond to a user’s first interaction. In this blog post, we will be discussing what FID is, how it affects your website’s user experience, and how to improve your FID score.

What is First Input Delay (FID)?

FID is a metric in Google’s Core Web Vitals, which measures website speed and performance. It measures the time interval between the first interaction a user has with a webpage, such as clicking a button, and the response from the browser. Essentially, it assesses whether your website is interactive or not.

Why is FID important?

FID is a key indicator of user experience on a website. Users expect websites to be interactive and responsive, and a long FID can lead to frustration and negatively impact the user experience. As a result, Google considers FID as a ranking factor when evaluating website quality.

How to improve your FID score?

Optimize server response time: A slow server response can cause a long FID. To optimize server response time, you can improve your server hardware, use a content delivery network (CDN), or optimize the database.

Minimize JavaScript execution time: Excessive JavaScript execution can delay the FID. To minimize JS execution time, limit third-party scripts, code-split large JavaScript files, and use a JavaScript optimizer.

Enable browser caching: Browser caching involves temporary storing website data on a user’s browser, which reduces the need for repeated requests to the server. You can enable browser caching by setting cache headers on your server.

Optimize images: Heavy images can lead to long FID. To optimize images, compress them, use the right file format, and use lazy-loading to delay loading non-critical images.

Reduce network latency: Network latency refers to the time it takes to send a request to the server and receive a response. To reduce latency, you can use a CDN, optimize images, and minimize HTTP requests.


FID is an important metric to consider for website owners and developers. If your website has a long FID, it can negatively impact your user experience and search engine ranking. By optimizing server response time, minimizing JavaScript execution time, enabling browser caching, optimizing images, and reducing network latency, you can reduce your FID score and improve your website’s performance. Remember, your website’s user experience should always be a top priority!

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