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Google I/O 2012 - Jank Busters: Building Performant Web Apps

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Published on Jun 29, 2012

Nat Duca, Tom Wiltzius

Building high-performance web apps is hard! When animations hitch, mouse hover effects lag, or page scrolls stutter, we call it jank. This talk is about hunting jank down and exterminating it.

Sources of jank in web apps include garbage collector runs, long image decodes, heavy paint times for DOM elements, JavaScript-heavy input handlers, unexpected WebKit layer invalidations, and more -- all getting in the way of the 60FPS every modern app developer should aim for. In this talk we'll go through a few techniques to ensure your web app has smooth animations, transitions, and scrolling. We'll cover ways to use Chrome's Developer Tools to root out jank, as well as more advanced Chrome graphics profiling tools the intrepid can use to dig into what's going on behind the scenes. We'll even peek gingerly under the covers of WebKit to explain why that pesky hitch occurs in the first place.

For all I/O 2012 sessions, go to https://developers.google.com/io/

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All Comments (11)

  • Lucas Rizoli

    Lucas Rizoli 1 month ago

    This is a very good talk: your explanations and recommendations and demos are clear, you handle the questions well and frankly. Thanks.

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  • MediaFilter

    MediaFilter 1 month ago

    Funny guys, good talk!

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  • dwoldrich

    dwoldrich 4 months ago

    setAnimationFrame seems frame locked at 30Hz on Firefox. So, it turns out ... setTimeout is a drop-in replacement for setAnimationFrame, for me, on Firefox. :)

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  • Benjamin Gruenbaum

    Benjamin Gruenbaum 4 months ago

    Worth noting that although jQuery says it works with requestAnimationFrame, it actually does not (look at the source!)

    good talk

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  • Jakob Anderson

    Jakob Anderson 4 months ago in playlist Google I/O 2012

    Very Very Good Talk. I continue to find numerous ways of speeding and smoothing my web apps, and this talk showed me some new ones I had never heard of!

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  • wizzra

    wizzra 5 months ago

    A great talk!

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  • bgrgyk

    bgrgyk 5 months ago

    37:02

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    in reply to regnoult axel(Show the comment)
  • harimakenji10

    harimakenji10 5 months ago

    first

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