https://bugzilla.wikimedia.org/show_bug.cgi?id=70402
Bug ID: 70402
Summary: Review and deploy ImageMetrics extension to Wikimedia
wikis
Product: Wikimedia
Version: wmf-deployment
Hardware: All
URL: https://www.mediawiki.org/wiki/Extension:ImageMetrics
OS: All
Status: NEW
Severity: normal
Priority: Unprioritized
Component: Extension setup
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected],
[email protected], [email protected]
Blocks: 31235
Web browser: ---
Mobile Platform: ---
[[mw:Extension:ImageMetrics]] will be used to collect additional data about
image performance and (eventually - not implemented yet) about how users
interact with media. It does not alter the behavior of the wiki, so there
should be no need for community consensus or design review.
Security summary: all data collection is done via EventLogging, and data will
be used internally or published via limn.
Performance summary: the extension has a similar architecture to
NavigationTiming, except it lazy-loads the main script. Currently it consists
of a ~300 byte top script which sets up pre-domready event handling, a
¬300-byte bottom script which deals with request sampling, and a ~2K main
script which is lazy-loaded when the request is sampled and uses EventLogging
to log image load performance data. Currently the scripts are only loaded on
file pages, but I intend to change that as more functionality is added.
The code has already been reviewed internally by the Multimedia team.
After deployment, $wgImageMetricsSamplingFactor should be set to a suitable
value (1000, probably).
Related Mingle card:
https://wikimedia.mingle.thoughtworks.com/projects/multimedia/cards/816
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