Author Philip Tellis

4 articles

Philip Tellis is a geek, speedfreak and Chief RUM Distiller at SOASTA where he works on the mPulse product. mPulse helps site owners measure the real user perceived performance of their sites and help visualize correlations between performance and business metrics like conversions, sales, lolcats and more. You can use mPulse for free at http://www.soasta.com/free.

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Philip Tellis wrote

Analyzing Network Characteristics Using JavaScript And The DOM, Part 2

August 27, 2013 — In Part 1 of this series, we had a look at how the underlying protocols of the Web work, and how we can use JavaScript to estimate their performance characteristics. In this second part, we’ll look at DNS, IPv6 and the new W3C specification for the NavigationTiming API. Read More…

Philip Tellis wrote

Analyzing Network Characteristics Using JavaScript And The DOM, Part 1

November 14, 2011 — As Web developers, we have an affinity for developing with JavaScript. Whatever the language used in the back end, JavaScript and the browser are the primary language-platform combination available at the user’s end. It has many uses, ranging from silly to … Read More…

Philip Tellis wrote

Keeping Web Users Safe By Sanitizing Input Data

January 11, 2011 — In my last article, I spoke about several common mistakes that show up in web applications. Of these, the one that causes the most trouble is insufficient input validation/sanitization. In this article, I’m joined by my colleague Peter (evilops) Ellehauge in looking at … Read More…

Philip Tellis wrote

Common Security Mistakes in Web Applications

October 18, 2010 — Web application developers today need to be skilled in a multitude of disciplines. It’s necessary to build an application that is user friendly, highly performant, accessible and secure, all while executing partially in an untrusted environment that you, the developer, … Read More…