One of the biggest problems I had was the speed of the web ui but since the great github migration the speed increased massively and has stayed snappy.
Contributing code to GitLab has also been my favorite experience with open source as not only were my changes looked at, Gitlab developers actually helped me get things working and write better code.
We made a lot of performance improvements, I'm glad you're benefitting from them. On https://about.gitlab.com/handbook/engineering/performance/#p... you can see what we're measuring. The monitoring of our biggest merge request https://dashboards.gitlab.net/d/1EBTz3Dmz/sitespeed-page-sum... shows of our fixes regressed and we're looking into what is going wrong. Screenshot for people reading this in the future: https://www.dropbox.com/s/nlriugkzknu2tl9/Screenshot%202018-...
There is a lot more work to do and we'll keep shipping performance improvements in code and to our infrastructure. The tentative date for our migration to GCP is next weekend.
I'm so glad to hear that contributing code to GitLab was a favorite experience! Kudos to our merge request coaches who try to get every merge request over the finish line with a high quality.