@Aklapper, ok, let's discuss about this, this Friday. I guess we have these data for Bugzilla (work in progress for Maniphest), but not for Gerrit, at least in the dashboard.

Maybe I'm just too stupid to find this in korma, I think I once saw this?

This must have already existed at some time, seeing the screenshot in T68265: Code review time must be on merged patches, not closed (e.g. abandoned or merged) ones (but no URL given there)? Anybody knows what happened?

@Aklapper, as far as I know, those charts were wrong at some point are were moved to the third and fourth chart in korma.wmflabs.org/browser/gerrit_review_queue.html

However, those do not show the time to merge, but the life of the still opened changesets.

The third chart shows information about the mean and median life of the changesets that are open in each of the months. For instance, if you close a pretty old issue, that total amount will decrease in the following month. If that chart keeps increasing, that would mean that the changesets are simply there.

The fourth chart is similar, but divided by affiliation.

There's some extra info at https://www.mediawiki.org/wiki/Community_metrics#Gerrit_review_queue .

The two graphs shown in F13952 at T68265 correspond to what is today "Age of open changesets (monthly snapshots)" and "Age of open changesets by affilation (monthly snapshot)".

Until now, we have been calculating the median age of the open changesets. If this is what you want, we have the metrics and this task should be closed as invalid. If what you want is the age of the changesets, then we should mark this task as a duplicate of T68265 and continue the discussion there.