npm Best Practices [blog.risingstack.com]
Custom metrics for measuring image loads [stevesouders.com/hero-image-custom-metrics/]
Performance-Bookmarklet helps to analyze the current page through the Resource Timing API, Navigation Timing API and User-Timing - requests by type, domain, load times, marks and more. [github.com/micmro]
As of last week, we have started tracking what percentage of readers complete each post.