Hi - thanks for the feedback, we aren't where we want to be with performance. We are working hard to improve responsiveness and memory consumption, and have a recently started a team focused on just these aspects to accelerate the improvements. You can read more about the rationale here, including stories like yours: https://about.gitlab.com/2019/09/13/why-we-created-the-gitla...

One of the major projects the team is working on, is to switch from unicorn to puma: https://docs.gitlab.com/omnibus/settings/puma.html

We are also continuing our broader effort at improving performance each release, for example in 12.2 we had 58 MR's focused on performance improvements: https://about.gitlab.com/2019/08/22/gitlab-12-2-released/#pe...

Hopefully you will start to feel the impact of these investments soon.