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Web Performance
By Lusan Das
RAIL Performance Model
Response Animation Idle Load
< 100ms paint < 1000ms first paint< 50ms chunks< 16ms frame
Rendering Goals
DOM & CSSOM
Optimising CRP
1. Use media type and queries for css
2. avoid inline(exec pauses until CSSOM ready) for js
3. Use async with scripts
Measuring CRP
1. domLoading
2. domInteractive
3. domContentLoaded
4. domComplete
5. loadEvent
measureCRP
Performance Advice
1. HTML first, then CSS and then JS
2. Avoid js animations, use CSS!
3. Hardware accelerated CSS
4. Use preload
5. H2 server push
6. Service workers
7. Code splitting (lazy module loading)
8. Vector or svg images, load on media and many more
Thank you
Follow me on twitter @daslusan to get more updates!

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Web performance