BUG: File History Is An Order Of Magnitude Slow On Larger Repos

[alexAtSourcegraph]

• Sourcegraph version: 4.1.x
• Platform information: Self-Hosted K8s

Steps to reproduce:

1. Select a file within Sourcegraph Code Search within a repo that is ~5GB
2. Select "History" for the file and wait for the commit history of the file to appear

Expected behavior:

The file history should appear within 1-3 seconds.

Actual behavior:

The file history appears within 30 seconds

If you would like immediate help on this, please email support@sourcegraph.com (you can still create the issue, but there are no SLAs on issues like there are for support requests).

[camdencheek]

Hey @alexAtSourcegraph! Do you have any specific examples here? I'm happy to take a look to see if there was a regression, but file history can definitely be slow since we need to potentially iterate over many commits to find the ones that have changed the file we care about. This is a known issue, but not something that we expect to get better any time soon.