boomerang

The simplest way to measure impact on users would be to just use boomerang which gets you all of this out of the box: https://github.com/akamai/boomerang To do it yourself, you need a combination of PainTiming and measuring LongTasks or study the periodicity of setInterval/requestAnimationFrame The above works for synthetic as well as real users. If you're able to measure real users directly, then you'd also want to look at Input Delays, Rage Clicks, Dead Clicks, Missed Clicks, Scroll Jank.

I've recently been pondering whether to create a log receiver that will produce Prometheus metrics as well as logs for Loki. Why? Because there are several open source projects that if joined up in a relatively simple way would provide a full RUM / Analytics solution. For collecting the analytics: Akamai Boomerang, which is a descendant of Yahoo tooling https://github.com/akamai/boomerang and BSD licensed Then insert a collector that will produce Prometheus metrics and write log lines. The metrics will provide the timing information and in many ways will be richer than Google Analytics, and the log lines will provide the potentially high cardinality of string based data like user agents, URIs, etc and Grafana supports PromQL queries against logs such that you can gain metrics from the log lines too. Then add in a free Grafana Cloud https:

Recently I've been thinking there must be a better way. I want rich insights from a session angle, but I mostly want to know performance timings and what my end users experience. How can I improve my web apps to increase engagement, and where are the issues on my website as it's seen from a user's perspective. My current thought (not yet implemented) is to take several existing things and to glue them together. 1. Boomerang https://github.com/akamai/boomerang is a Real User Monitoring JS include that is open source and comes from the Yahoo and Akamai performance teams 2. Grafana Cloud https://grafana.com/products/cloud/ has Loki and Prometheus for log consumption and metrics respectively and now has a self serve plan of $50 per month (but I think this is reasonable as the data storage is managed for you and you could run many instances of

We had similar experiences with boomerang when we first implemented sendBeacon (I think about 3 years ago). You can see our solution here: https://github.com/akamai/boomerang/blob/master/boomerang.js...