Commit and stage execution time not constant

I am currently using LibGit2Sharp (v0.15.0) to keep track of differences in many HTML files (~10,000). Each change to a file or new file results in a single commit. I have noticed that writes and commits are getting slower and slower. Here is a visualization of my tests:

I tried to adjust the repository.Stage(...) and repository.Commit(...) time so that the size of the HTML file size was not taken into account. This was done by simply dividing the write and commit time by the file size.

I was not sure whether this slow down was expected, but after a bit of reading around, it seems to me that git commit should be constant time with respect to the number of commits or files already in the repository. I am not sure if the same assumption can be made about staging.

Is this a known issue with LibGit2Sharp? Or libgit2?

約10,000個のHTMLファイルというissueのワークロードを使用して、LibGit2Sharp v0.15.0で報告された低速化を再現し、リポジトリが大きくなるにつれてStageとCommitを測定します。結果を期待されるGitの動作と比較し、原因がLibGit2Sharpにあるのかlibgit2にあるのかを特定します。その調査結果と、関連するupstream issueがあれば記録します。