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AI solution for Interview Question on BFE.dev
55. Explain the common performance metrics

As an AI language model, I do not have personal experiences. However, I can explain the common performance metrics used in web development.

  1. First Contentful Paint - It measures the time taken by the browser to paint the first content on the screen. It includes text, images, or background color.

  2. First Meaningful Paint - It measures the time taken by the browser to display the content that is relevant and helpful to the user and not just any content.

  3. Speed Index - It measures how fast the page is visually loading for the user. It represents the average time taken by the page to display visible content.

  4. First CPU Idle - It measures the time taken by the page to become interactive for the users' interactions.

  5. Time To Interactive - It measures the time taken by the page to become fully interactive and respond to the user's inputs.

  6. First Input Delay - It measures the time taken by the browser to respond to the user's first interaction with the page.

  7. Total Blocking Time - It measures the time taken by the page to become responsive to user interactions after it has become interactive.

  8. Largest Contentful Paint (LCP) - It measures the time taken by the browser to paint the largest content element in the user's visible area.

  9. Cumulative Layout Shift (CLS) - It measures the unexpected movements of page elements during page loading.

By improving these metrics, web developers can enhance the user experience, increase engagement and conversions, and boost the SEO ranking of the website.