We can measure the FID of a website with the following tools: If we look at the following graph we will see the difference in requests from the main thread and how they are processed in the background. The interactivity index only focuses on the delay or delay in the processing of events. When we talk about field data, we mean that we need real user metrics because Google can’t simulate user interaction. We must emphasize that it is a fielding metric. Which indicates the time it takes to make your first interaction and the value of this metric. The most recommended is the Chrome inspector to measure Core Web Vitals. This metric can be measured through different tools. We must prevent our web users from having to wait for the information that they have already requested to be displayed. Just as we do not like to wait in a physical establishment to be served. Having a very good product or service is not enough if the page does not respond quickly to user demands. It depends both on the network and on the power of the device.Īnd, with the amount of information available, a user usually has little patience for a website to load. In mobile browsing, speed is very important. We will be causing a bad impression and may leave our website. If a user arrives at our website, clicks on a link and the page takes time to respond. The FID is considered a first impression metric. These are requests that are included in the head of the web and if they are loaded at the beginning they will increase the FID time. Let’s think about the loading of Tag Manager or Analytics, embedded videos, social network pixels, and measurement tools such as a heat map,…
#FIRST INPUT DELAY CODE#
On many occasions, it is due to very heavy JavaScript code or many requests.
It looks like everything has been loaded.īut the system is unable to respond to the user’s request because it is finishing downloading other DOM elements. Having a slow FID is usually caused by the effect of JavaScript and/or CSS elements on the website.
What Causes a High FID (First Input Delay)? Google’s measurement of the FID is based on weighting the metrics of real users using the Google Chrome browser.īeing a metric that depends on user interaction.īots cannot simulate clicks or real behavior for a laboratory test that we want to do with a measurement tool.
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