Dive deep into the inner workings of WebKit's rendering engine in this 32-minute JSConf talk. Uncover the mysteries behind common web development techniques and challenges, including the true effects of translateZ(0), the impact of CSS style recalculations on performance, and the causes of intermittent page flashes. Explore the reasons behind using setTimeout(0) for CSS transitions and animations, and understand the unreliability of DOM timers. Gain insights into these complex topics through detailed explanations and examinations of C++ code, providing a comprehensive look at the "black magic" powering web browsers. Be prepared for an in-depth technical discussion that will enhance your understanding of web rendering processes and help you optimize your web development practices.