KR: File Tree SpeedIndex <1000 => 41%

Much of this work will be tracked in gitlab-org&3273.

So with the latest measurement we see an improvement to 1739 from 2239 at the beginning of the quarter, which is in total an improvement of 500ms which is 41% of the target of an improvement of 1239ms.

Retrospective

Good

• This was the actual target of the KR but we also improved a lot of numbers especially total load time and first paint across all web vitals
• We made a huge push towards more performance based work
• Long standing items were finally done
• New concepts for loading data + JS
• A lot of big initiatives were started or got a big focus (Fontawesome removal, image resizing, Page Specific CSS, Unused CSS,jQuery removal)
• New tooling to support it CSS Statistics + GDK Sitespeed runs Couple of improvements that have global impact
• Google has not flagged any of our routes as bad performance for desktop anymore since beginning of July

Bad

• Too ambitious for one quarter and quite simply a lot of work
• Lot of huge Do it all before you see impact initiatives like the icons
• Our CSS is still huge and tackling that started only in July
• A lot of dependencies involved, like jQuery removal lead to no impact so far
• Hard to identify from early on the best changes for impact so some of the issues came in late
• Not enough bandwidth in teams to tackle the topics fully

Try

• Keep pushing on performance topic in Q3
• Define clearer targets around web vitals
• Spread performance knowledge in teams