CSS and the Critical Path

Explore techniques for optimizing CSS loading and rendering in this conference talk from CSSConfUS2014. Dive into the critical path of website performance, understanding how the browser constructs the render tree using DOM and CSSOM. Learn about the Guardian's innovative approaches to accelerate CSS delivery, including critical CSS, inline CSS, and resilient system design. Discover the importance of performance monitoring and explore alternatives like HTTP2 Server Push. Gain insights on creating fast-loading websites that respond to user input within milliseconds, breaking news to users in under 1000ms. Understand why performance matters and how to tackle common browser bottlenecks from networking to painting.

Introduction
Critical CSS
Inline CSS
Resilient System
Performance Monitoring
Alternatives
HTTP2 Server Push
Summary