C# Programming Performance Tips - Part Three - Adding Strings

Akshay Patel

7y14.4k525Blog

5 Comments

Join the conversation! Your thoughts help the community grow.

Mohammed Sajid6y ago
Hi Akshay, i think a simple addition like : result = str + str1 + " is an author."; has also the same performance as the string.concat
Atul Sharma7y ago
Hi Akshay, I see a few issues in this article. #1. When I move StringBuilder at first position, i get this output "String Builder 27String.Format 22 String.Concat 6 String Interpolation 6"This is probably because of this - https://stackoverflow.com/questions/28950581/c-sharp-takes-more-time-to-do-first-execution#2 - Sample data is too small to conclude. #3 - This is very helpful for this comparison - https://michaelscodingspot.com/challenging-the-c-stringbuilder/
- Akshay Patel7y ago
  I do agree on - The first execution includes the time that the Just In Time (JIT) compiler spends converting the code from Microsoft's Intermediary Language (MSIL) into the native executable machine code of whatever machine you're running the code on.All subsequent calls are re-using that already compiled code. But find my inline comments #1 When we are aware that compiler takes time for first execution, then we should not change the position and evaluate the performance, better we can add first method twice, so that for the same method we can get correct result in the second execution and I did the same thing. The result is Interpolation First iteration 223, Interpolation second iteration 6, string.format 43, string.concat 1, string builder 3. In this case also string.concat is the winner #2 You are free to try with large data set also, I never suggested to try with the given set. I have just shared what I experienced. #3 The given link is helpful, one should refer that. You will find better link for each and every existing link for sure.
- Akshay Patel7y ago
  Kramer Lee You are absolutely right, Please do the same and share in our community, in that way you can also start contributing.
- Kramer Lee7y ago
  I would suggest that we should run these commands separately instead of once. And we should compare the result at least three times.

You can read all the C# performance tips from the following links,

Here, we will do the benchmarking for string interpolation, string format, string concat, and string builder.

string str = "Akshay";
string str1 = " Patel";
string result = string.Empty;
Stopwatch s1 = new Stopwatch();
String Interpolation
s1.Start();
result = $ "{str} {str1} is an author.";
Console.WriteLine("String Interpolation " + s1.ElapsedTicks.ToString());
String.Format
s1.Restart();
result = string.Format("{0},{1} is an author.", str, str1);
Console.WriteLine("String.Format " + s1.ElapsedTicks.ToString());
String.Concat
s1.Restart();
result = string.Concat(str, str1, " is an auther");
Console.WriteLine("String.Concat " + s1.ElapsedTicks.ToString());
StringBuilder
s1.Restart();
StringBuilder sb = new StringBuilder();
sb.Append(str);
sb.Append(str1);
sb.Append(" is an auther");
result = sb.ToString();
Console.WriteLine("String Builder " + s1.ElapsedTicks.ToString());
Console.ReadLine();

We have adopted four different ways to add two string variables. Let’s see the benchmarking result.

C# Programming Performance Tips #3 - String Add

Benchmarking result suggests going with String.Concat.