Developing modern applications in cloud

 Often when we are wring code we don't think about performance and go with the default options available to achieve a task. String concatenation is one such scenario. If you are doing simple and few string catenations, then you can use the following result = string1 + string2; string1+= string2; result = String.Concat(string1,string2); String.Format and string interpolation are few other options.  However when you are performing large and repetitive  operation, string catenation can be expensive. Here is an example to prove the point.  As you can see it took 41 seconds to perform 100k string catenation. Now lets replace this with StringBuilder and see.  8 ms!!!!!! That is a massive performance difference. Hope you get the point. More info on StringBuilder can be found here https://learn.microsoft.com/en-us/dotnet/api/system.text.stringbuilder?view=net-7.0

Here is a sample code. Can you guess what the output would be ? public static class TasksExample { public static void Execute() { Task[] tasks = new Task[10]; for (int i = 0; i < 10; i++) { tasks[i] = Task.Run(() => CalculateResult(i)); } Task.WaitAll(tasks); //ask.Wait(); //Console.WriteLine(tasks[i].Result); Console.WriteLine("Next work..."); } public static int CalculateResult(int i) { Console.WriteLine($"work starting {i}"); Thread.Sleep(10000); Console.WriteLine($"Completed work {i}"); return 100; } } Pat yourself if your answer was like this work starting 10 work starting 10 work starting 10 work starting 10 work starting 10 work starting 10 work starting 10 work starting 10 work starting 10 work starting 10 Completed...