Crash when opening large file diff within PR

[06needhamt]

Describe the bug App hangs and crashes when opening a large diff within the PR changes view

To Reproduce Steps to reproduce the behavior:

1. Go to This PR
2. Open Changed files
3. Click on 'CSharpResources.Designer.cs'
4. Wait approx 30 seconds
5. App crashes without an error

Expected behavior Expected the file diff to open and display normally

Screenshots

Smartphone (please complete the following information):

• Device: iPhone 8
• OS: iOS 13.3
• Browser Google Chrome
• Version 79.0.3945.73

Additional context Small diffs seem to open as expected only large diffs (over 5000) lines seem to be affected.