Why Pull operations is so Slow?

Hi all, I'm new and I'm developing using this library. I have some problem with pull operations. This is my code:

 Debug.Write("Pulling branch. . .");
            LibGit2Sharp.PullOptions options = new LibGit2Sharp.PullOptions();
            options.FetchOptions = new FetchOptions();
            options.FetchOptions.CredentialsProvider = new CredentialsHandler(
                (url, usernameFromUrl, types) =>
                    new UsernamePasswordCredentials()
                    {
                        Username = this.Username,
                        Password = this.Password
                    });
            Signature author = new Signature(this.Username, this.EmailUser, DateTime.Now);
            Commands.Pull(Repo, author, options);
            Debug.Write("Pulling done.");

I don't uderstand why Pulling ONE FILE (txt 1kb) is so SLOW. Is there anyone help me?

从 Commands.Pull 调用以及 FetchOptions 和 CredentialsProvider 的设置入手。分别测量 fetch、身份验证和 pull 阶段，然后使用现有的评论线程确定是否已经确认了可复现的速度变慢问题和预期完成时间；只有在确定了原因或明确界定了性能修复范围后，才算完成。