History for a file can be much slower than GitHub

[eseliger]

Example: https://sourcegraph.com/github.com/JetBrains/intellij-community@4a918183ef774c275cb12ec31e74c50c9d841ead/-/blob/platform/lang-impl/src/com/intellij/ide/actions/searcheverywhere/SymbolSearchEverywhereContributor.java#tab=history

The solution to this is pretty straightforward: We need to get our maintenance tasks to work without corruption.

Packing all loose refs makes it a bit faster. Writing commit-graph with changed-paths index reduces it by 70%.