MediaWiki Engineering

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Guides

Development tools

Tools and services we provide for developers that maintain or contribute to MediaWiki.

Frontend development

ResourceLoader bundle size (Grafana): Stats about the size of your asset bundles.
ResourceLoader module builds (Grafana): Stats about how long your asset bundles take to build during cache misses.
ResourceLoader manifest size (Grafana): The size of your module metadata (name, dependencies, version hash) as sent to the browser in the site-wide "startup" request from all pageviews.
mw.inspect: Inspect frontend build sizes in production or locally during development.

Backend development

WANCache (Grafana): Performance stats for specific chunks of MediaWiki code in core and extensions.
Backend Pageview Timing: Overall backend latency from MediaWiki when generating pageviews, e.g. to the CDN and to logged-in users.
Backend Save Timing (Grafana): Overall latency when saving edits to articles. See also Save Timing breakdown by page type, account type, and entry point.