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using System.Text;

using BenchmarkDotNet.Attributes;

using BenchmarkDotNet.Running;

BenchmarkRunner.Run<StringBuilderBenchmark>();

[MemoryDiagnoser]

public class StringBuilderBenchmark

{

private const string TextToAppend = "Hello World from Steven";

[Params(5, 10, 25)]

public int Iterations { get; set; }

[Benchmark]

public string StringBuilder()

{

var builder = new StringBuilder();

for (var i = 0; i < Iterations; i++)

builder.Append(TextToAppend);

return builder.ToString();

}

[Benchmark]

public string ListOfStrings()

{

var list = new List<string>();

for(var i = 0; i< Iterations;i++)

list.Add(TextToAppend);

return string.Join(string.Empty, list);

}

[Benchmark]

public string Concat()

{

var output = string.Empty;

for (var i = 0; i < Iterations; i++)

output += TextToAppend;

return output;

}

}