First input delay7/26/2023 ![]() ![]() ![]() This determines how they experience and perceive your web performance (and therefore whether they will stay or go). The first time a user interacts with your page is their first impression, and first impressions are everything. FID only measures the first user interaction To summarise, user input includes clicks not scrolls. That means it can only be something that has a clear beginning and end point, like tapping a button, clicking a link, or selecting a checkbox.Ĭontinuous types of user interaction, like scrolling your web page or zooming, can’t be properly measured using this metric because there’s no response expected from the site itself - and the goal for First Input Delay is to measure how responsive a site is while it’s loading. The events that count as user interactions must be discrete, or finite. There are a few things that are matter when measuring First Input Delays. FID measures the actual experience of real users who enter your page. It cannot be simulated in a lab test – it requires real user input in order to be measured. That's what makes First Input Delay one of the most exciting web performance metrics - it is one of the pure Real User Metrics, not a lab metric. By addressing your FID, you can overcome that feeling of frustration that users may experience while your page is loading. More than that, improvements to site performance and user experience generally lead to increased conversions, sales, and ad revenue. It’s one of the Core Web Vitals, which are the metrics Google uses to determine the quality of your site’s user experience and, in turn, its page rank. The important thing to know about FID is that Google uses it as a ranking factor. Think of it like measuring the time from when you ring someone’s doorbell to them answering the door. when you click or tap on something like a link or a button, to the time the browser responds to your action and starts processing it. To put it in simpler terms, FID is the delay between the user interaction e.g. This is sometimes called Input Latency.įirst Input Delay measures the amount of time in milliseconds (ms). What is First Input Delay (FID)?įirst Input Delay (FID) is a web performance and user experience metric that tracks the time from when a visitor first interacts with a web page to the time when the browser starts processing the interaction. We'll also reveal some ways you can optimise your FID for better results. In this post, we’ll explain what FID is, how to measure it and what a good FID score is. That's where First Input Delay (FID) comes in. But how do you know whether your site is achieving the right speeds? First Input Delay is an essential metric to track and improve on your web page.ĭelivering a fast user experience to your website visitors is critical to your site’s success. ![]()
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