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More about LCP

This approximates when the main content of the page is visible to the users. 

The elements that are taken into consideration for Largest Contentful Paint: 

  • <img> elements
  • <image> elements inside an <svg> element
  • <video> elements (the poster image is used)
  • An element with a background image loaded via the   
Block-level

In the future, additional elements might be added, like <svg> and <video>

Extra info: 

LCP

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MORE IDEAS ON THIS

CLS - part 2

  • Prefer transform animations to animations of properties that trigger layout changes. Animate transitions in a way that provides context and continuity from state to state.

More info: 

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How to improve LCP

Causes: 

  • Slow server response times
  • Render-blocking JavaScript and CSS
  • Resource load times
  • Client-side rendering

For improvements, some relevant techniques:

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Speed Index

While anything you do to improve page load speed will improve your Speed Index score, addressing the following should have a particularly big impact:

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The metrics measured

        Name - Weight in score - Summary

  1. First Contentful Paint (FCP) - 10% - Time to paint the first text or image
  2. Time to Interactive (TTI) - 10% - Necessary time for the app to become fully interactive (responding within 50ms from user interaction)
  3. Speed Index (SI)...

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More about TBT

TBT measures the total amount of time that a page is blocked from responding to user input, such as mouse clicks, screen taps, or keyboard presses. The sum is calculated by adding the blocking portion of all 

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TTI

It measures how long it takes a page to become fully interactive. A page is considered fully interactive when:

  • The page displays useful content, which is measured by the  
  • Event handlers are registered for most visible page elements,...

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CLS

CLS is a measure of the largest burst of layout shift scores for every 

unexpected

How to improve:

  • Always inclu...

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How to improve TBT

Try to diagnose the root cause of long tasks, using 

What is causing my long tasks?

In general, the most common causes are:

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    Short notices

     Some of the values are calculated based on 

    data from the HTTP Archive

    If you don't have a very specific reason to optimise only one of the metrics, the be...

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    FCP

    Very important for this part is the font load time. For faster load, it can be used the font-display: swap. This will make the site to render the default font and when the loading is done, the font will be changed. Also, you can preload the fonts. 

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    TTI - PRPL Pattern

    PRPL is an acronym that describes a pattern used to make web pages load and become interactive, faster:

    • Push (or preload) the most important resources.
    • Render the initial route as soon as possible.
    • Pre-cache

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    The metrics measured

            Name - Weight in score - Summary

    1. First Contentful Paint (FCP) - 10% - Time to paint the first text or image
    2. Time to Interactive (TTI) - 10% - Necessary time for the app to become fully interactive (responding within 50ms from user interaction)
    3. Speed Index (SI)...

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