Snippet

Large String Construction Speed

In C#, strings are immutable, meaning they cannot be changed. Using '+' in a loop creates many temporary objects. StringBuilder provides a mutable buffer that significantly improves performance for large text operations.

snippet.cs

csharp

using System.Text;
 
public class TextProcessor {
    public string JoinWords(string[] words) {
        // StringBuilder is more efficient than normal string concatenation in loops
        var sb = new StringBuilder();
        foreach (var word in words) {
            sb.Append(word).Append(" ");
        }
        return sb.ToString().Trim();
    }
}

Breakdown

new StringBuilder()

Creates an object optimized for building and modifying strings.

sb.Append(word)

Adds content to the end of the buffer without creating a new string object.

Previous snippet Next snippet

More Beginner C# exercises →

Large String Construction Speed

Related