,NET STRING BUFFER使用 與時間計算

private void testString()
{
    String tempstr = "abcdefghijklmnopqrstuvwxyz";
    int times = 50000;
    long aa, bb,cc,dd;
    DateTime startDate,endDate;
    DateTime startDate1, endDate1;
    richTextBox1.AppendText("string測試開始\r\n");
    startDate = DateTime.Now;
    aa = startDate.Ticks;
    String str = "";
    for (int i = 0; i < times; i++)
    {
      str += tempstr;
    }
    endDate = DateTime.Now;
    bb = endDate.Ticks;
    richTextBox1.AppendText("執行時間︰" + ((Double)(bb - aa) / 10000) + "毫秒  = "+ (Double)(bb - aa) / 10000000+"秒\r\n");
    
    
    richTextBox1.AppendText("StringBuilder測試開始\r\n");
    startDate1 = DateTime.Now;
    cc = startDate1.Ticks;
    StringBuilder strb = new StringBuilder();
    for (int i = 0; i < times; i++)
    {
    strb.Append(tempstr);
    }
    endDate1 = DateTime.Now;
    dd = endDate1.Ticks;
    richTextBox1.AppendText("執行時間︰" + (Double)(dd - cc) / 10000 + "毫秒 = " + (Double)(dd - cc) / 10000000+"秒");
    richTextBox1.AppendText("效能差距︰" + (Double)(bb - aa) / (Double)(dd - cc)+ "倍");

}

引用來源