Learn about Core Web Vitals and how they impact user experiences. Dive into Interaction to Next Paint (INP) and explore strategies for optimizing web performance. Discover the importance of measuring Largest Contentful Paint for better user experiences. Plus, enjoy sponsor shoutouts and join a tech-focused Slack community.
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Quick takeaways
Core Web Vitals measure loading performance, interaction responsiveness, and layout stability for great user experiences.
Interaction to Next Paint (INP) assesses user interaction responsiveness, with under 200ms being good and over 500ms considered poor.
Optimizing interactions, avoiding pitfalls like slow event handlers, and utilizing tools like the scheduler API enhance Core Web Vitals.
Deep dives
Understanding Core Web Vitals
Core Web Vitals are health metrics for web pages focused on loading performance, interaction responsiveness, and layout stability. These metrics aim to ensure a great user experience by measuring key aspects important for real users.
INP: Interaction to Next Paint
INP measures how quickly a page responds to user interactions, indicating user satisfaction. A good score is under 200 milliseconds, while anything over 500 milliseconds is considered poor. INP captures both fast and slow interactions, emphasizing the immediate feedback users expect.
Common IP Pitfalls
Common INP pitfalls include slow event handlers, excessive DOM manipulation, and too much JavaScript affecting interactivity. Optimizing interactions by prioritizing critical tasks, tracing main thread activity, and using tools like the scheduler API can address these pitfalls.
LCP: Largest Contentful Paint
LCP focuses on the largest piece of visible content loading on a page that users find essential to the page's usefulness. It represents when important elements like text, images, or logos are fully rendered, signaling to users that the page is ready for interaction.
The Importance of Real User Data in Analyzing Web Performance
Real user data provides insights into user behavior patterns like prioritizing images based on user interactions. Analytics data helps identify common causes of loading performance issues. Understanding metrics like LCP from real users enhances web performance optimization efforts.
Significance of Core Web Vitals and Continuous Web Performance Improvement
Core Web Vitals metrics contribute to overall user experience on a web page. Improving web performance benefits conversion rates and user engagement. Sharing successful case studies and knowledge within the community aids in collective improvement efforts.
This week, Amal and Nick are joined by Rick Viscomi and Annie Sullivan from the Chrome team to dive into Core Web Vitals, a set of performance metrics geared towards helping developers surface web page quality signals that are key to delivering great user experiences.
We deconstruct the different vitals and learn how they are helpful, as well as introduce the newest vital to hit the scene, Interaction to Next Paint (INP). Join us for a fun and nerdtastic discussion as we dive into the humbling universe of web performance!
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