The importance of fast user interaction

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Browser Average LCP (ms)
Chrome 2200
Firefox 2300
Safari 2400
Microsoft Edge 2500
What is First Input Delay?
First Input Delay (FID) measures the delay time between a user's first input and the moment the browser is able to respond to that interaction.


Fast interaction with elements on the page, such as buttons or links , is band phone number data crucial for a positive user experience. Google recommends that FID be less than 100 ms.

How to improve FID?
Techniques to improve FID include:

JavaScript Minimization : Removing unnecessary scripts.
Lazy loading JavaScript : Delayed loading of scripts that are not needed immediately.
Using Web Workers : Delegating heavy operations to separate threads.
What is Cumulative Layout Shift?
Cumulative Layout Shift (CLS) is a metric that measures the visual stability of a page. CLS is calculated based on the shifting of elements on the page as it loads.