Philip Tellis

Philip Tellis is a geek who likes to make the computer do his work for him. As Principal RUM Distiller at Akamai, he analyses the impact of various design decisions on web application performance, scalability and security. He is the creator of "boomerang" -- a JavaScript based web performance measurement tool.

In his spare time, Philip enjoys cycling, reading, cooking and learning spoken languages.

Montreal 2025 sessions

Core Web Vitals and their effect on User Experience

English session - Intermediate

The Core Web Vitals - Largest Contentful Paint, Interaction to Next Paint, and Cumulative Layout Shift - were chosen because they are a close proxy for how good or bad a user experience is. There are some things to be aware of... Are they available on all page types, or across browsers, when do they become available, how do we capture them, etc.

In this talk we'll understand what the Core Web Vitals are and how to make use of them.

The Statistics of Anomaly Detection

English session - Intermediate

If you collect any kind of real-time data, you're probably interested getting alerted when this data goes out of whack, but setting static thresholds has the downside of having a lot of false positives. Using Anomaly Detection can help determine normal patterns and alert you when those go out of whack.
In this talk we'll look at some of the methods of detecting anomalies in your data.