Only include XHR and Fetch performance timings by default, more is opt-in.

[codecapitano]

Why

The Faro performance instrumentation processes and sends all resource entries emitted by the browsers resource timeline.
The number of entries emitted can grow very large depending on how resource heavy a web app/site is.
This can be hundreds of items and more per user session!

Most users are interested in initial load and render performance, web-vitals and xhr/fetch performance.
So we want to decrease resource consumption by only tracking the most necessary entries an make the rest opt-ing

What

• By default only track resource entries for fetch and xhr requests
• Allow to opt-in for more or everything
  • Should be easy to be disabled with a single setting
  • Allow to customize what entries should be included (or not)