StringBuilder or ' ' Operator: Which is More Efficient for String Concatenation?

Strough connection efficiency: In -depth discussion

In the string connection operation, efficiency is very important, especially when dealing with a large number of string or frequently executing connection operations. Generally, people choose the '' 'or StringBuilder for string connection, but the best choice is not general.

Senior .NET performance expert Rico Mariani conducted an in -depth analysis of this problem. He suggested to select the appropriate solution based on the following modes:

One -time connection

: If you need to execute the connection operation similar to "x = f1 (...) f2 (...) f3 (...) f4 (...)", That is, to complete the connection of multiple string in a line of code, then the '' 'operator is a fast and effective solution. In this case, StringBuilder will not bring significant performance improvement.
• Increased connection : On the contrary, if your mode is more similar to "if (...) x = f1 (...)", "if (...) x = f2 ( ... "...", "if (...) x = f3 (...)", "if (...) x = f4 (...)", that is, gradually add string to In 'x' variables, then StringBuilder will be more advantageous. It avoids unnecessary memory distribution and string creation, thereby improving performance.
• Another famous expert Eric Lippert also elaborates in detail the optimization technology when using the '' 'during a single -line connection. His analysis emphasizes the efficiency advantage of this method in specific scenarios.
Therefore, the key to selecting the most effective string connection method is to analyze the specific application scenarios and consider the characteristics of one -time connection and incremental connection.

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