Building a Fast Website for Every Single Visitor

Developers can use the 'window.navigator.deviceMemory' API to get an approximate number of gigabytes of RAM on the user's device, allowing them to tailor the user experience accordingly.

The 'Hardware Concurrency' API provides the number of logical processor cores, helping developers optimize performance by tailoring resource-intensive tasks based on the user's device capabilities.

A user's internet connection speed can drastically impact how quickly a website loads, affecting their overall experience. Developers can use APIs to detect connection speed and adjust content delivery accordingly.

The Aurora project collaborates with frameworks to optimize image delivery, providing an image component that is optimized out of the box for better performance.

The talk focuses on building a fast and accessible website for every user, emphasizing the importance of considering user perception and adaptive implementation.

User perception is crucial because it varies depending on the user's context, such as their device and connection speed, which affects how fast or slow a website feels to them.

The two methods are lab testing, which simulates user experience, and field testing (or real user monitoring), which collects real data from users.

Developers can use responsive images with the 'source set' attribute to provide different image sizes for different devices, ensuring better performance and user experience.

The 'Effective Type' API gives an estimate of the user's network conditions (like 4G or 3G). It is controversial due to privacy concerns, as it can potentially be used to infer a user's location and movements.

Browser list helps bundlers like Webpack and Babel to know which features to polyfill or transpile, ensuring compatibility with the specified browsers and reducing unnecessary code.