public void CollectionPerformanceTest() { var p = new Persistable<People>(Path); Stopwatch watch = new Stopwatch(); watch.Start(); for (int i = 0; i < 1000; i++) { p.Value.Persons.Add(new Person { FirstName = "Velio", LastName = "Ivanov", Age = 40 }); p.Save(); } watch.Stop(); Console.Out.WriteLine(string.Format("Time elapsed: {0}", watch.Elapsed)); }