`review-build-cng` job duration increased from 27.3 minutes on 2020-08-24 to 29.4 minutes on 2020-10-28

What is the GitLab engineering productivity problem to solve?

The review-build-cng job duration was 27.3 minutes until 2020-08-24, but has increased since then to stabilize around 29.4 minutes now.

The gitlab-rails-ee of the CNG-mirror pipelines increased by 1 minute in the same timeframe: https://app.periscopedata.com/app/gitlab/652085/Engineering-Productivity---Pipeline-Build-Durations?widget=7014205&udv=1005715

Given that this job is a bottleneck job, that means this adds 2 minutes to all frontend pipelines.

https://app.periscopedata.com/app/gitlab/652085/Engineering-Productivity---Pipeline-Build-Durations?widget=6914314&udv=1005715

Problem identification checklist

• The root cause of the problem is identified.
• The surface of the problem is as small as possible.

What are the potential solutions?

• All potential solutions are listed.
• A solution has been chosen for the first iteration: PUT THE CHOSEN SOLUTION HERE

Verify that the solution has improved the situation

• The solution improved the situation.
  • If yes, check this box and close the issue. Well done! 🎉
  • Otherwise, create a new "Productivity Improvement" issue. You can re-use the description from this issue, but obviously another solution should be chosen this time.