Development statistics

Live statistics

 * Wikimedia software statistics on Open Hub (formerly Ohloh), including many projects.
 * Technical community metrics (Git, Gerrit, Phabricator, mailing lists) at https://wikimedia.biterg.io/.
 * Gerrit
 * Gerrit/Navigation
 * Gerrit/Reports
 * Gerrit reports on mediawiki.org
 * Phabricator
 * Phabricator offers tables showing open tasks by priority and by either user or project. Burndown charts are available per sprint.
 * "Phabricator monthly statistics" emails on the wikitech-l mailing list - see its archives.
 * Active users and new accounts per month
 * Mailing lists
 * Wikimedia mail stats and power posters.
 * IRC:
 * Most active users on IRC: #mediawiki, #wikimedia-dev, #wikimedia-tech and others.
 * Gerrit and Phabricator: WikiContrib to query the recent activity of a list of people (see T220254).

Other selected statistics

 * Yearly (?) code review statistics, including information about Gerrit reviewers.
 * Test coverage trends in our continuous integration.
 * Code quality reports for core (may still be gathering data).
 * Development statistics/Extensions.

Historical / Obsolete / Outdated / Non-working

 * Top commenters and distribution of unreviewed revisions.
 * Commit summaries and reversion ratio.
 * Active committers by year.
 * Code review (SVN era, pre-2012: still in need of replacement):
 * Code review stats (archive by Nemo);
 * Total number of each status;
 * Codereview stream;
 * Signpost investigation: code review times.