Request Timeout
With the increase in 3rd party content on websites, I’ve evangelized heavily about how Frontend SPOF blocks the page from rendering. This is timely given the recent Doubleclick outage. Although I’ve...
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SERIOUS CONFUSION with Resource Timing
or “Duration includes Blocking” Resource Timing is a great way to measure how quickly resources download. Unfortunately, almost everyone I’ve spoken with does this using the “duration” attribute and...
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Joining SpeedCurve
I’m excited to announce that I’m joining SpeedCurve! SpeedCurve provides insight into the interaction between performance and design to help companies deliver fast and engaging user experiences. I’ll...
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Hero Image Custom Metrics
The takeaways from this post are: If your website has a hero image, make sure it loads and renders as early as possible. Many designs that feature a hero image suffer from HID (Hero Image Delay) mostly...
View ArticledomInteractive: is it? really?
Netflix published a great article, Making Netflix.com Faster, about their move to Node.js. The article mentions how they use performance.timing.domInteractive to measure improvements: In order to...
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HTTP Archive: past and future
Background The HTTP Archive crawls the world’s top 500K URLs twice each month and records detailed information like the number of HTTP requests, the most popular image formats, and the use of gzip...
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Critical Metric: Critical Resources
A big change in the World of Performance for 2015 [this post is being cross-posted from the 2015 Performance Calendar] is the shift to metrics that do a better job of measuring the user experience. The...
View ArticleHTTP Archive switches to Chrome
The HTTP Archive crawls the world’s top URLs twice each month and records detailed information like the number of HTTP requests, the most popular image formats, and the use of gzip compression. In...
View ArticleVelocity Farewell
Velocity Origin Story In 2007, my first book, High Performance Web Sites, was selling very well. That, plus the launch of YSlow, brought more attention to web performance. As a result, Jon Jenkins...
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HTTP Archive New Leadership
I announced the HTTP Archive six years ago. Six years ago! It has exceeded my expectations and its value continues to grow. In order to expand the vision, I’ve asked Ilya Grigorik, Rick Viscomi, and...
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