Diff Checker

-for (...) n += (i*i); return 2 *n
+for (...) n += 2*(i*i); return n
-  public int square_i_two();
+  public int two_square_i();
     descriptor: ()I
     flags: ACC_PUBLIC
     Code:
-      stack=3, locals=3, args_size=1
+      stack=4, locals=3, args_size=1
 : iconst_0
 : istore_1
 : iconst_0
 : istore_2
 : iload_2
 : aload_0
 : getfield      #2                  // Field size:I
-: if_icmpge     24
+: if_icmpge     26
 : iload_1
-: iload_2
+: iconst_2
 : iload_2
-: imul
+: iload_2
-: iadd
+: imul
-: istore_1
+: imul
-: iinc          2, 1
+: iadd
-: goto          4
+: istore_1
-: iconst_2
+: iinc          2, 1
-: iload_1
+: goto          4
-: imul
+: iload_1
 : ireturn
       LineNumberTable:
-        line 63: 0
+        line 54: 0
-        line 64: 2
+        line 55: 2
-        line 65: 12
+        line 56: 12
-        line 64: 18
+        line 55: 20
-        line 67: 24
+        line 58: 26
       LocalVariableTable:
         Start  Length  Slot  Name   Signature
-20     2     i   I
+22     2     i   I
 28     0  this   Lorg/sample/MyBenchmark;
 26     1     n   I
       StackMapTable: number_of_entries = 2
         frame_type = 253 /* append */
           offset_delta = 4
           locals = [ int, int ]
         frame_type = 250 /* chop */
-          offset_delta = 19
+          offset_delta = 21
     RuntimeVisibleAnnotations:
 : #25()

Editor

Original Text

for (...) n += (i*i); return 2 *n
  public int square_i_two();
    descriptor: ()I
    flags: ACC_PUBLIC
    Code:
      stack=3, locals=3, args_size=1
         0: iconst_0
         1: istore_1
         2: iconst_0
         3: istore_2
         4: iload_2
         5: aload_0
         6: getfield      #2                  // Field size:I
         9: if_icmpge     24
        12: iload_1
        13: iload_2
        14: iload_2
        15: imul
        16: iadd
        17: istore_1
        18: iinc          2, 1
        21: goto          4
        24: iconst_2
        25: iload_1
        26: imul
        27: ireturn
      LineNumberTable:
        line 63: 0
        line 64: 2
        line 65: 12
        line 64: 18
        line 67: 24
      LocalVariableTable:
        Start  Length  Slot  Name   Signature
            4      20     2     i   I
            0      28     0  this   Lorg/sample/MyBenchmark;
            2      26     1     n   I
      StackMapTable: number_of_entries = 2
        frame_type = 253 /* append */
          offset_delta = 4
          locals = [ int, int ]
        frame_type = 250 /* chop */
          offset_delta = 19
    RuntimeVisibleAnnotations:
      0: #25()

Changed Text

for (...) n += 2*(i*i); return n
  public int two_square_i();
    descriptor: ()I
    flags: ACC_PUBLIC
    Code:
      stack=4, locals=3, args_size=1
         0: iconst_0
         1: istore_1
         2: iconst_0
         3: istore_2
         4: iload_2
         5: aload_0
         6: getfield      #2                  // Field size:I
         9: if_icmpge     26
        12: iload_1
        13: iconst_2
        14: iload_2
        15: iload_2
        16: imul
        17: imul
        18: iadd
        19: istore_1
        20: iinc          2, 1
        23: goto          4
        26: iload_1
        27: ireturn
      LineNumberTable:
        line 54: 0
        line 55: 2
        line 56: 12
        line 55: 20
        line 58: 26
      LocalVariableTable:
        Start  Length  Slot  Name   Signature
            4      22     2     i   I
            0      28     0  this   Lorg/sample/MyBenchmark;
            2      26     1     n   I
      StackMapTable: number_of_entries = 2
        frame_type = 253 /* append */
          offset_delta = 4
          locals = [ int, int ]
        frame_type = 250 /* chop */
          offset_delta = 21
    RuntimeVisibleAnnotations:
      0: #25()

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