repo.Commits.QueryBy(filename) slow on large repos

Reproduction steps

1): Clone a large repo
2): run this function on that repo with some random file:

public IEnumerable<string> TestSlow(string filename)
{
    using (var repo = new Repository(repoRoot))
    {
        string path = filename.Substring(repoRoot.Length + 1).Replace("\\", "/");
        foreach (LogEntry entry in repo.Commits.QueryBy(path))
        {
            yield return entry.Commit.Author.ToString();
        }
    }
}

3. run this command on the same file: "git log --follow --oneline -- "

Expected behavior

I expect similar time to be taken by TestSlow and the git log command above

Actual behavior

The git log command finishes in about 1.6 ms on my repo
The TestSlow command takes about 70 seconds.

Here is what I see in my profiler:

Version of LibGit2Sharp (release number or SHA1)

0.27.0-preview-0017
0.26.1
0.24.1

Operating system(s) tested; .NET runtime tested

.NET Framework 4.7.2 on Windows 10

首先，在大型仓库中复现使用 repo.Commits.QueryBy(path) 的 TestSlow 与 git log --follow --oneline -- <file> 之间的比较。使用报告的 profiler 视图和计时结果，定位 QueryBy 将时间花在哪里。完成的标准是，在保留返回的 commit 条目的同时，将大型仓库上的运行时间降低到接近可比 git 命令的水平。