. NET makes string addition a waste of CPU

The code used for comparison

The main is the comparison of the + and the built-in string merging methods directly using string

Random rand=new random ();            Byte[] A = new byte[10000];            for (int i = 0; i < a.length; ++i) a[i] = (byte) rand. Next (n);            DateTime now1 = DateTime.Now;            string S1 = "";            for (int i = 0; i < a.length; ++i)                S1 + = Convert.ToString (A[i], +) + "";            DateTime end1 = DateTime.Now;            DateTime now2 = DateTime.Now;            List<string> s2=new list<string> ();            for (int i = 0; i < a.length; ++i)                S2. ADD (Convert.ToString (a[i], +));            String s3 = String. Join ("", S2. ToArray ());            DateTime end2 = DateTime.Now;            MessageBox.Show ((END1-NOW1). Totalmilliseconds.tostring () + ":" + "\ n" + (END2-NOW2). Totalmilliseconds.tostring () + ":" + "\ n");

Print results

55.00311.0001

The result: The built-in method is a victory over the string addition, the more merges the more obvious.

. NET makes string addition a waste of CPU