<!--- 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 opening a directory with a large number of files, the browser becomes unresponsive. If you give it enough time, the browser becomes responsive again and the web IDE does function but with a noticeable amount of lag. A customer [reported](https://gitlab.zendesk.com/agent/tickets/122327) (Zendesk, internal use only), and it was seen on a support call with them, that their browser crashes when opening a directory with approximately 11,000 files. This is affecting their workflow as their developers are unable to commit code to that directory using the Web IDE. ### Steps to reproduce 1. Have a project with a very large number of files in a directory 1. Open the project in web IDE 1. Open the directory ### Example Project https://gitlab.com/weimeng/web-ide-test-large-files ### What is the current *bug* behavior? The browser is not responsive while the directory contents are being loaded. ### What is the expected *correct* behavior? The browser should remain responsive while the directory contents are being loaded. ### Relevant logs and/or screenshots N/A ### Output of checks This bug happens on GitLab.com ### Possible fixes (If you can, link to the line of code that might be responsible for the problem)