# YahooArchive/boomerang

End user oriented web performance testing and beaconing

Repository: https://github.com/YahooArchive/boomerang
Canonical: https://ross.abutalabs.com/products/boomerang
Homepage: http://lognormal.github.com/boomerang/doc/
Language: JavaScript
License: NOASSERTION
License Family: other
Topics: web, javascript, performance
Archived: true
Last push: 2023-07-17T17:42:28+00:00

## Health v2 (maintenance only)
Score: 10/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 5949, "days_push": 1143, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases, archived, no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1172, forks 440 (observed 2026-08-28T04:03:51.664094+00:00)

## What it is
Boomerang is a JavaScript library that measures web page performance characteristics from real end users' browsers and beacons the results back to a server. It is embedded in web pages and initialized with a single init() call to collect timing and user experience metrics.

## Use cases
- measure real user page load times
- collect web performance metrics from browsers
- monitor frontend performance in production
- send performance beacons to an analytics backend
- track user-perceived browsing experience

## When to choose
- you need real user monitoring (RUM) data from actual visitors
- you want a mature, self-hosted performance beaconing library
- you need detailed page timing metrics without heavy dependencies

## When to avoid
- you need synthetic or lab-based performance testing instead of real-user data
- you want a modern actively developed RUM solution with vendor support
- your project requires a permissively simple licensing setup, since the license is nonstandard

## Facets
- artifact type: library
- maturity: maintenance
- function: monitoring, analytics, http-client
- domain: web-development, performance, analytics, frontend
- platform: browser
- tags: real-user-monitoring, rum, beacon, page-load-timing, web-vitals, javascript

## Member repositories
- YahooArchive/boomerang (main) score 10

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:03:51.664094+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T06:28:25.862334+00:00, confidence not recorded.
  - readme: https://github.com/YahooArchive/boomerang (fetched 2026-08-28T04:03:51.664094+00:00, sha 024371a6b000)
- Data as of 2026-08-30T08:39:29.467469+00:00.