Thank you for creating this, @kostajh!

Change 860942 had a related patch set uploaded (by Gergő Tisza; author: Gergő Tisza):

[mediawiki/extensions/GrowthExperiments@master] User impact trendcharts: use space better

https://gerrit.wikimedia.org/r/860942

Change 860942 merged by jenkins-bot:

[mediawiki/extensions/GrowthExperiments@master] User impact trendcharts: use space better

https://gerrit.wikimedia.org/r/860942

In T323478#8422586, @gerritbot wrote:

Change 860942 merged by jenkins-bot:

[mediawiki/extensions/GrowthExperiments@master] User impact trendcharts: use space better

https://gerrit.wikimedia.org/r/860942

@Tgr the above might have introduced (or surfaced) another issue, which is that the start time in the sparkline doesn't seem to match what the page views tool shows. Compare:

Per the page views tool, I'd expect:

• to see the spike all the way to the left in the sparkline in the articles list
• the page view count in the articles list (8,568) to match what the page views tool shows (7,835)

Definitely not introduced, the patch just changed the vertical spacing. I think this is T323253: NewImpact module: Page view data should be limited to when user made their first edit: the pageview tool shows the time range from the user's first edit to the present day, the sparklines show the last 60 days, with days before the user's first edit zeroed out. Which makes sense IMO, it would be very confusing to show a bunch of sparklines under each other in a table column, with the x axis having a different meaning for each. Probably the nice approach would be to cut the entire chart at the first edit date, and just have the rest be empty space (or maybe keep the chart but cut the line).