A Baseline for Web Performance with PhantomJS

  • July 10, 2014 · 7:00 PM

A Baseline for Web Performance with PhantomJS with Wesley Hales from Shape Security

HTTP requests, heavy/unminified resources, and UI thread blocking should be on the mind of every front-end developer. These are just a few issues that can cause serious bottlenecks in page load times. Having a faster load time equals better search engine rankings, higher conversion rates, and an overall reduction in bandwidth costs. How do we measure all the aforementioned performance killers? How can we bring these measurements into our automated build process to ensure that our site is getting better, and not worse?

PhantomJS, a headless WebKit with JavaScript API, gives us the ability to create lightweight performance measurement tools with JavaScript (and so much more). In this talk we’ll review how PhantomJS has influenced some of the web’s top ranking sites and how it can be put into any automated build to produce reporting on performance. We’ll look at how other open source projects such as WebPageTest.org measure up to this approach and see when one might be better over the other.


The event is hosted at Fastly on Thursday, July 10th, 2014 at 7:00PM. Doors open at 6:30PM. Food and drinks will be provided by our sponsor Fastly (thanks guys!). Fastly is located on the 1st floor at 651 Brannan Street in San Francisco. 

Live stream URL: http://meetup.fastly-streams.com/


• 18:30 - Check-in & Mingle

• 19:00 - Introductions & Presentation

• 20:00 - Questions and Answer & Open Form

• 20:30 - Networking & Discussion & Beers at the pub!


O'Reilly Velocity Conference - O'Reilly Velocity Web Performance and Operations Conference

FastlyFastly is a developer-friendly, Varnish-based CDN that speeds up your site by delivering static, dynamic, and streaming content with the lowest recorded latency. We've built our network for the future with 10Gb Ethernet, multi-core CPUs, and all Solid State Drives (SSDs), and our transparent real-time and historical analytics dashboard provides critical performance insights. Our customers, including Github, New Relic, Etsy,Twitter, Shazam, Shopify, Wanelo, Wayfair, and Yammer, trust Fastly to accelerate their business. 

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