File: metrics.yaml

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# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.

# Adding a new metric? We have docs for that!
# https://firefox-source-docs.mozilla.org/toolkit/components/glean/user/new_definitions_file.html

---
$schema: moz://mozilla.org/schemas/glean/metrics/2-0-0
$tags:
  - 'Core :: DOM: Performance APIs'

performance.time:
  response_start:
    type: timing_distribution
    time_unit: millisecond
    telemetry_mirror: TIME_TO_RESPONSE_START_MS
    description: >
      Time from navigationStart to responseStart as per the W3C
      Performance Timing API.
      (Migrated from the geckoview metric of the same name.)
    bugs:
      - https://bugzilla.mozilla.org/show_bug.cgi?id=1344893
      - https://bugzilla.mozilla.org/show_bug.cgi?id=1489524
      - https://bugzilla.mozilla.org/show_bug.cgi?id=1580077
      - https://bugzilla.mozilla.org/show_bug.cgi?id=1877842
    data_reviews:
      - https://bugzilla.mozilla.org/show_bug.cgi?id=1580077#c10
    notification_emails:
      - vchin@mozilla.com
      - perf-telemetry-alerts@mozilla.com
    expires: never