Caching is a process that temporarily stores copies of data in a cache, which is a high-speed data storage layer. This practice is crucial for improving the performance of websites and applications. When a user requests a web page or a resource, the cache delivers the stored data instead of fetching it from the server […]

Total Blocking Time [TBT]

Total Blocking Time

Total Blocking Time (TBT) is used as part of Core Web Vitals to measure in milliseconds (ms) how responsive your website is to user input. Essentially, TBT measures the amount of time your web page was blocked, preventing the user from interacting with it. If the main thread of your page load is blocked, your […]

Time to First Byte [TTFB]

Time to First Byte

Page Speed Insights uses the Time to First Byte (TTFB) to demonstrate Core Web Vitals, and most speed tools use it to measure website speed. TTFB is measured in seconds (s) and is the time it takes to obtain information from the server and send it back to the browser. You could say that it […]

Largest Contentful Paint [LCP]

Largest Contentful Paint

The Largest Contentful Paint (LCP) is measured in seconds (s) and records the amount of time it takes the browser to render the largest piece of content or element after a user requests the page. Typically, the largest element is an image or a video or, depending on the type of website, a large text […]

First Input Delay [FID]

First Input Delay

First Input Delay (FID) is measured in milliseconds (ms). It is the time from when a user first engages with a web page (e.g. clicking on a link, tapping a button or another JavaScript-based action etc.). to when the browser responds to that action. It is a measurement taken from when the user first clicks […]

First Contentful Paint [FCP]

First Contentful Paint

First Contentful Paint (FCP) measures the time it takes for the browser to render a “human-perceived” element on the page, such as an image, text block, or other element. This difference between FCP and Largest Contentful Paint focuses on when the user receives helpful information rather than when a browser loads a particular large element. […]

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