{"id":6949,"date":"2022-09-06T01:57:14","date_gmt":"2022-09-05T20:27:14","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-how-much-faster-is-stringbuilder-respect-of-concat-operator-in-c-net-duplicate\/"},"modified":"2022-09-06T01:57:14","modified_gmt":"2022-09-05T20:27:14","slug":"solved-how-much-faster-is-stringbuilder-respect-of-concat-operator-in-c-net-duplicate","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-how-much-faster-is-stringbuilder-respect-of-concat-operator-in-c-net-duplicate\/","title":{"rendered":"[Solved] How Much Faster is StringBuilder respect of concat operator + in C# .Net [duplicate]"},"content":{"rendered":"

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\n<\/p>\n

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The Microsoft Developer Network has a great comparison:<\/p>\n

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Although StringBuilder and String both represent sequences of
\n characters, they are implemented differently. String is an immutable
\n type. That is, each operation that appears to modify a String object
\n actually creates a new string.<\/p>\n

For example, the call to the String.Concat method in the following C#
\n example appears to change the value of a string variable named value.
\n In fact, the Concat method returns a value object that has a different
\n value and address from the value object that was passed to the method.
\n Note that the example must be compiled using the \/unsafe compiler
\n option. For routines that perform extensive string manipulation (such
\n as apps that modify a string numerous times in a loop), modifying a
\n string repeatedly can exact a significant performance penalty. The
\n alternative is to use StringBuilder, which is a mutable string class.
\n Mutability means that once an instance of the class has been created,
\n it can be modified by appending, removing, replacing, or inserting
\n characters. A StringBuilder object maintains a buffer to accommodate
\n expansions to the string. New data is appended to the buffer if room
\n is available; otherwise, a new, larger buffer is allocated, data from
\n the original buffer is copied to the new buffer, and the new data is
\n then appended to the new buffer.<\/p>\n<\/blockquote>\n

The recommended usage for a String<\/code> is:<\/p>\n