Javaのfor最適化は意味あるか否か classfile -> javap

javap_output

C:\pleiades\workspace\MyCodeBox\src>javap -c OptimizeForLoop.class
Compiled from "OptimizeForLoop.java"
public class OptimizeForLoop {
  public OptimizeForLoop();
    Code:
       0: aload_0
       1: invokespecial #1                  // Method java/lang/Object."<init>":()V
       4: return

  public static void main(java.lang.String[]);
    Code:
       0: aload_0
       1: invokestatic  #2                  // Method noOptimize:([Ljava/lang/String;)V
       4: aload_0
       5: invokestatic  #3                  // Method optimize:([Ljava/lang/String;)V
       8: return

  public static void noOptimize(java.lang.String[]);
    Code:
       0: iconst_0
       1: istore_1
       2: iload_1
       3: aload_0
       4: arraylength
       5: if_icmpge     23
       8: getstatic     #4                  // Field java/lang/System.out:Ljava/io/PrintStream;
      11: aload_0
      12: iload_1
      13: aaload
      14: invokevirtual #5                  // Method java/io/PrintStream.println:(Ljava/lang/String;)V
      17: iinc          1, 1
      20: goto          2
      23: return

  public static void optimize(java.lang.String[]);
    Code:
       0: iconst_0
       1: istore_1
       2: aload_0
       3: arraylength
       4: istore_2
       5: iload_1
       6: iload_2
       7: if_icmpge     25
      10: getstatic     #4                  // Field java/lang/System.out:Ljava/io/PrintStream;
      13: aload_0
      14: iload_1
      15: aaload
      16: invokevirtual #5                  // Method java/io/PrintStream.println:(Ljava/lang/String;)V
      19: iinc          1, 1
      22: goto          5
      25: return
}

C:\pleiades\workspace\MyCodeBox\src>