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Firefox 100% CPU issue in Files view on a project with lots of files

We have a issue with using the files view. After loading the page. FF turns on 100% CPU usage and is barely usable at all.

Steps to reproduce:

  1. Open a new project and add a lot of files. On a linux system:

cd /etc

git add .

git commit

should be enough.

  1. open Firefox

  2. click on the Files view of the project.

reproducable: always

Gitlab: 7.0.0, 7.2.0, 7.4.2

tested FF versions: 31,33.0a2 (2014-08-23), 34.0a1 (2014-08-18), nighlty 36.0a1

Test repo: https://gitlab.com/adamcstephens/test_issue_521