child_containing_descendant()
is_ancestor()
**Problem:** `is_ancestor()` uses a slow, bottom-up parent lookup which has performance pitfalls detailed in #28512. **Solution:** Take `is_ancestor()` from $O(n^2)$ to $O(n)$ by incorporating the use of the `child_containing_descendant()` function
severity
setqflist
setloclist
vim._with
64847fbdc9
