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?

Start at the Commands.Pull call and its FetchOptions and CredentialsProvider setup. Measure the fetch, authentication, and pull stages separately, then use the existing comment thread to determine whether a reproducible slowdown and expected completion time were established; done requires an identified cause or a clearly scoped performance fix.