Sessions at JSConf EU 2011 about JavaScript and Web Performance

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Saturday 1st October 2011

  • Using jsPerf correctly

    by Mathias Bynens

    jsPerf (http://jsperf.com/) makes it easy to create performance test cases and run benchmarks across different browsers and devices -- but it also makes it very easy to do it wrong. Incorrect test cases lead to incorrect results, and we don't want to spread misinformation when it comes to JavaScript performance. In this presentation, we will be taking a look at some common mistakes in jsPerf tests, and we'll learn how to avoid them for great justice.

    At 10:30am to 11:00am, Saturday 1st October

    In Upstairs, Alte Münze Berlin

  • Messing with JavaScript and the DOM to measure network performance characteristics

    by Philip Tellis

    While building boomerang (Yahoo!'s performance measurement tool), we developed many interesting methods to measure network performance characteristics using JavaScript running in the browser. While the W3C's NavigationTiming API provides access to many performance metrics, there's far more you can get at with some creative tweaking and analysis of how the browser reacts to certain requests.

    In this talk, I'll go into how we measure things like bandwidth, latency, TCP connect time, DNS time, IPv6 connectivity, and if time permits, port scanning using JavaScript in the browser.

    At 4:00pm to 4:30pm, Saturday 1st October

    In Upstairs, Alte Münze Berlin

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