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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
# Adding a new metric? We have docs for that!
---
$tags:
- 'Core :: DOM: Core & HTML'
perf:
page_load:
type: event
description: >
Recorded when a top level content document has been loaded.
bugs:
data_reviews:
notification_emails:
- perf-telemetry-alerts@mozilla.com
- dpalmeiro@mozilla.com
expires: never
extra_keys:
load_time:
description:
"Time between loadEventStart and navigationStart, in ms."
type: quantity
unit: ms
response_time:
description:
"Time between responseStart and navigationStart, in ms."
type: quantity
unit: ms
fcp_time:
description:
"Time between firstContentfulPaint and naviationStart, in ms."
type: quantity
unit: ms
js_exec_time:
description:
"Time spent executing JS during page load, in ms."
type: quantity
unit: ms
redirect_time:
type: quantity
description:
"Time spent in redirections for the top level document."
unit: ms
redirect_count:
description:
"Number of redirections for the top level document."
type: quantity
unit: integer
load_type:
description:
"One of normal,reload,stop,link,history,error or other."
type: string
same_origin_nav:
description:
"If true, a normal navigation was performed on the same origin."
type: boolean
http_ver:
description:
"Version of HTTP protocol used."
type: quantity
unit: integer
trr_domain:
description:
"TRR domain used."
type: string
send_in_pings:
- pageload