Diff compare with DiffTargets.WorkingDirectory is terribly slow

Reproduction steps

Compare commit to the working tree directory on a relatively big repository

 repository.Diff.Compare<TreeChanges>(
              repository.Head.Tip.Tree,
              DiffTargets.WorkingDirectory)

which takes a long time or never completes. Comparing the working trees of two commits works instantly

                    var branchDiffResult = repository.Diff.Compare<TreeChanges>(
                       targetCommit.Tree,
                        repository.Head.Tip.Tree,
                        compareOptions);

Additionally, doing repository.RetrieveStatus() is also slow, but not that slow.

Expected behavior

The speed of the two matches.

Actual behavior

Comparing to working directory is terribly slow.

Version of LibGit2Sharp (release number or SHA1)

0.27.0.0

Operating system(s) tested; .NET runtime tested

4.72, windows 11

在一個相對較大的 repository 上使用 repository.Diff.Compare(repository.Head.Tip.Tree, DiffTargets.WorkingDirectory) 重現效能變慢的問題，然後將其與 commit-to-commit 多載和 repository.RetrieveStatus() 進行比較。追蹤工作目錄比較路徑，並測量時間花費在哪裡。當工作目錄比較以與 commit-to-commit 比較相當的效能完成時，即表示完成。