The Specificity Graph

The Specificity Graph is a very simple model for diagrammatically assessing the overall health of your codebase in terms of specificity—a way of looking at an entire project’s CSS and highlighting any potentially troublesome areas of higher-than-ideal specificity. We can then use this snapshot to refactor and rearchitect old projects into a better shape, or …

PerfMap: front-end performance heatmap

A bookmarklet to create a front-end performance heatmap of resources loaded in the browser using the Resource Timing API. Wait for a page to fully load and then click the bookmarklet to overlay a performance heatmap. A browser with support for the Resource Timing API is required. PerfMap: front-end performance heatmap →

What Will It Take to Run a 2-hour Marathon?

The current world record of 2:02:57, set by Kenyan Dennis Kimetto this year in Berlin, works out to 4:41.5 per mile; a sub-two would require less than 4:35 per mile. Will a human ever run that fast? Some fascinating number-crunching, and some great conclusions/predictions too. What Will It Take to Run a 2-hour Marathon? →

Human Cities

Human helps people move almost twice as much in six weeks. Every day, people track millions of activities with our app. We visualized 7.5 Million miles of activity in major cities all across the globe to get an insight into Human activity. Walking, running, cycling, and motorized transportation data tell us different stories. The site …