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Mobile Performance: All Questions Answered

Lyza Gardner (Cloud Four), Tammy Everts (SOASTA), Guy Podjarny (Snyk), Lara Hogan (Etsy)
Grand Ballroom E
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Does RWD make mobile performance better or worse? What’s the best solution for responsive images? What tools are good for analyzing mobile performance? Will HTTP/2 have more or less impact on mobile web traffic? How do I measure performance in native mobile apps? Come to this panel of mobile performance experts to hear these and other questions answered.

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Lyza Gardner

Cloud Four

Lyza Danger Gardner is a dev. She has built, broken and hacked web things since 1996. Curiously, Lyza was actually born and raised in Portland, Ore., the town where everyone wants to be but no one seems to be from.

Apparently too cool for (high) school, Lyza started college early and cobbled together a motley education: a BA in Arts and Letters from Portland State University, followed by a master’s program in computer science at the University of Birmingham (UK).

Lyza has written a lot of web applications (server-side devs, represent!), defeated wily content management systems, optimized mobile web sites, pounded on various APIs, and worried a lot about databases. Fascinated by the way mobile technology has changed things, she now spends a lot of time thinking about the future of the web, mobile and otherwise.

Since co-founding Cloud Four, a Portland-based mobile web agency, in 2007, Lyza has voyaged further into the deep, untrammeled reaches of Device Land, exploring the foibles and chaos of mobile browsers and the mobile web. She has an odd set of anachronistic hobbies and it has been said she takes a fair number of photographs. She owns a four-letter .com domain. I bet you can guess what it is and go visit her there.

Lyza and co-founder Jason Grigsby are the authors of Head First Mobile Web.

Photo of Tammy Everts

Tammy Everts


Tammy has been studying how people use the internet since the olden days, when being able to centre text was a big deal and you could have any colour of website you wanted, as long as that colour was grey. Her twenty-year research journey into the heart of UX began when she rigged out her first usability test lab with a state-of-the-art Power Mac 9500. Since then, she’s also done some pretty far-out studies involving EEG headsets and facial action coding.

Today, as director of research at SOASTA, Tammy gets to analyze billions of beacons’ worth of real user data in order to understand the intersection between web performance, user experience, and business metrics. Her book, Time Is Money: The Business Value of Web Performance, was published by O’Reilly Media in 2016. She runs the popular industry blog The Performance Beacon and co-curates (with Tim Kadlec) WPO Stats.

Photo of Guy Podjarny

Guy Podjarny


Guy Podjarny, or Guypo, is a Chief Product Architect at Akamai. Guy works on Automated Front-End Optimization, and was the co-founder and CTO of, later acquired by Akamai. Guy has been in the web application field for over a decade, moving from Web Application Security to Web Application Performance, but keeping his focus on deep analysis of web pages. Guy is also a self admitted efficiency fanatic, looking to extract the most out of everything, from a packed suitcase to a complex web 2.0 app

Photo of Lara Hogan

Lara Hogan


Lara Hogan is a senior engineering manager at Etsy and the author of Designing for Performance. She champions performance as a part of the overall user experience, striking a balance between aesthetics and speed and building performance into company culture.