Jing Jin & Matthew Delaney: The Web's Black Magic

3,713 views · Published 24 October 2012 · 32:24 · Indexed 21 October 2026

Channel: JSConf · 2012 · Science & Technology

Watch on YouTube

Ever wondered what's *really* happening under the hood when you apply translateZ(0)? Feeling shaky about how/when pesky CSS style recalcs are slowing things down? Do intermittent page flashes, having to use setTimeout(0) to trigger CSS transitions/animations, or unreliable DOM timers ever get you down? If so, we'll explain how all this black magic works and more through the lens of WebKit's rendering engine. Warning: there might be a lot of blood, guts, and C++ code.

For reuse of this video under a more permissive license please get in touch with us. The speakers retain the copyright for their performances.

More from this channel

• 29:49 Michael Bebenita & Shu-yu Guo: Low Level JavaScript

  JSConf

  2,168 views · 16 October 2012

• 29:19 Michael Starzinger: The Footprint of Performance

  JSConf

  1,683 views · 18 October 2012

• 27:17 Florian Loitsch: JavaScript as a compilation target - Making it fast

  JSConf

  2,730 views · 22 October 2012

• 31:38 Anders Heijlsberg & Luke Hoban: Introducing TypeScript

  JSConf

  3,062 views · 30 October 2012

• 24:59 Kevin Markman: Taking Web Apps Offline

  JSConf

  1,512 views · 5 November 2012

• 26:28 Max Krohn: IcedCoffeeScript

  JSConf

  1,259 views · 6 November 2012

• 21:16 Sebastian Golasch: Prof. JavaScript and his incredible machines

  JSConf

  1,078 views · 20 November 2012

• 27:26 Garann Means: Improvisational JavaScript

  JSConf

  1,360 views · 29 November 2012