[GitHub] [incubator-shardingsphere] yanyzy commented on issue #3034: Optimize performance, reduce unnecessary loops

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yanyzy commented on issue #3034: Optimize performance, reduce unnecessary loops
URL: https://github.com/apache/incubator-shardingsphere/pull/3034#issuecomment-531631589
 
 
   @tuohai666 I tested it locally using the following code
   
   ```java
   @Test
       public void valueOfBenchmark() {
           int[] commands = new int[100_0000];
           for (int i = 0; i < 100_0000; i++) {
               commands[i] = random.nextInt(31);
           }
   
           Stopwatch stopwatch = Stopwatch.createStarted();
           for (int i = 0; i < 100_0000; i++) {
               MySQLCommandPacketType.valueOf(commands[i]);
           }
           System.out.println("1st Time of execution in MILLISECONDS:" + stopwatch.stop().elapsed(TimeUnit.MILLISECONDS));
   
           stopwatch = Stopwatch.createStarted();
           for (int i = 0; i < 100_0000; i++) {
               MySQLCommandPacketType.valueOfOrigin(commands[i]);
           }
           System.out.println("2st Time of execution in MILLISECONDS:" + stopwatch.stop().elapsed(TimeUnit.MILLISECONDS));
       }
   ```
   and the result of the operation is:
   1st Time of execution in MILLISECONDS:12
   2st Time of execution in MILLISECONDS:50

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