While looking at a WebPageTest waterfalls, I often come across surprising attributes. A few weeks back, I came across a page that had images with a familiar file naming convention: https://twitter.com/dougsillars/status/1086196363010949121 This website is using the Mac screenshot tool to create images that they are using online! Image Optimization I've written a lot about … Continue reading Using Screenshots in Production
As users of the web, we all know what a 404 error means: "File Not Found." There are memes and jokes made about things that are not found and the number 404. (https://http.cat is a fun site) But, when you cannot find things, everything takes longer. Just think about how much time you spend … Continue reading Four Oh Four: Performance Not Found
Every few months, I like to take a deep dive into the HTTP Archive to understand how the web is using various technologies. In 2018, I wrote about Images, video and Base64 encoding. In today's post, I want to take a look at how the web is using Animated GIFs. (and thats a hard G in GIF, … Continue reading State of the Web: Animated GIFs
In previous posts on video streaming, I’ve looked at how video adaptive streaming works and some of the performance impacts on video on the mobile web. In this post, I’d like to combine these two ideas by looking at how websites are streaming video, and see if websites are following the best practices I have proposed. … Continue reading Mobile Web and Video Streaming: What trends do we see?
As more and more customers use high bandwidth networks, video has become the norm on the web. Streaming movies, YouTube, and Facebook Live now all stream right onto your phone. Video is shown to enhance engagement, so we should not expect that the growth of video will abate. To better understand how video is … Continue reading Video on the Mobile Web: A Performance Study