<!--- Please read this! Before opening a new issue, make sure to search for keywords in the issues filtered by the "regression" or "bug" label. For the Community Edition issue tracker: - https://gitlab.com/gitlab-org/gitlab-ce/issues?label_name%5B%5D=regression - https://gitlab.com/gitlab-org/gitlab-ce/issues?label_name%5B%5D=bug For the Enterprise Edition issue tracker: - https://gitlab.com/gitlab-org/gitlab-ee/issues?label_name%5B%5D=regression - https://gitlab.com/gitlab-org/gitlab-ee/issues?label_name%5B%5D=bug and verify the issue you're about to submit isn't a duplicate. ---> ### Summary When editing a large MR on using Microsoft Edge, there's a lag between the typing and the letters being rendered in the comment box. ### Steps to reproduce Using the Edge browser, scroll on the way down of the `DONTREAD.md` file [here](https://gitlab.com/OK_MF/gitlab-dummy/merge_requests/1/diffs#67c4ca1eefb5c7b305be9b48b8e16c977515c514) and start typing in a comment. You'll notice it's very slow. I was unable to reproduce this on Chrome. It was reasonable. ### Example Project https://gitlab.com/OK_MF/gitlab-dummy/merge_requests/1/diffs#67c4ca1eefb5c7b305be9b48b8e16c977515c514 ### What is the current *bug* behavior? (What actually happens) ### What is the expected *correct* behavior? Typing performance should be on-par with other browsers.