https://bugzilla.wikimedia.org/show_bug.cgi?id=70790
Bug ID: 70790
Summary: Performance/architecture review of ImageMetrics
Product: Wikimedia
Version: wmf-deployment
Hardware: All
OS: All
Status: NEW
Severity: normal
Priority: Unprioritized
Component: Extension setup
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Blocks: 70402
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.
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.
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