- [Narrator] To make decisions for web performance…we know now that there are many…information available client-side only,…such as the network information API,…device memory, save-data, and even responsive queries,…such as the current available width,…the current device pixel ratio,…so the resolution of the screen.…But sometimes we need to access that data in the server.…For example, to apply some…reactive web performance techniques,…such as changing the amount of data or the quality…of the data that we are sending based on this information.…
Also, because we might want…to serve better responsive images.…Such as, the browser is requesting for the picture.…Without more information, the server can't say,…Okay, let's say we are in an iPhone X…We are in a slow 2G, and we have that memory.…Well, let's send that version.…Another user, oh, this is an Android?…It's on 4G, and it has different resolution,…and only has two gigabytes of memory.…Okay, let's use this version.…Or let's compress more the jpeg file that they are sending.…
- Understanding the Performance APIs
- Navigation Timing
- Calculate milestones in the Performance Timeline
- Measuring the timing of navigation, resources, servers, and more
- Reading network and device information
- Optimizing code
Skill Level Advanced
Designing Websites for Performancewith Brian Wood43m 32s Appropriate for all
1. Reactive Web Performance
2. Performance Basics
3. Measure Performance
4. Decision-Making Helpers
5. Execute Code More Efficiently
Next steps1m 31s
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