Github user kanzhang commented on the pull request:
https://github.com/apache/spark/pull/448#issuecomment-42248502
@marmbrus my untrained eyes couldn't spot any difference (you may want to
verify it yourself just to make sure :). For example,
RDD.unpersist() with RDD[T] return type:
```
public org.apache.spark.rdd.RDD<T> unpersist(boolean);
flags: ACC_PUBLIC
Code:
stack=4, locals=2, args_size=2
0: aload_0
1: new #208 // class
org/apache/spark/rdd/RDD$$anonfun$unpersist$1
4: dup
5: aload_0
6: invokespecial #209 // Method
org/apache/spark/rdd/RDD$$anonfun$unpersist$1."<init>":(Lorg/apache/spark/rdd/RDD;)V
9: invokevirtual #211 // Method
logInfo:(Lscala/Function0;)V
12: aload_0
13: invokespecial #108 // Method
sc:()Lorg/apache/spark/SparkContext;
16: aload_0
17: invokevirtual #213 // Method id:()I
20: iload_1
21: invokevirtual #217 // Method
org/apache/spark/SparkContext.unpersistRDD:(IZ)V
24: aload_0
25: getstatic #157 // Field
org/apache/spark/storage/StorageLevel$.MODULE$:Lorg/apache/spark/storage/StorageLevel$;
28: invokevirtual #160 // Method
org/apache/spark/storage/StorageLevel$.NONE:()Lorg/apache/spark/storage/StorageLevel;
31: invokespecial #186 // Method
storageLevel_$eq:(Lorg/apache/spark/storage/StorageLevel;)V
34: aload_0
35: areturn
LocalVariableTable:
Start Length Slot Name Signature
0 36 0 this Lorg/apache/spark/rdd/RDD;
0 36 1 blocking Z
LineNumberTable:
line 167: 0
line 168: 12
line 169: 24
line 170: 34
Signature: #1819 //
(Z)Lorg/apache/spark/rdd/RDD<TT;>;
public boolean unpersist$default$1();
flags: ACC_PUBLIC
Code:
stack=1, locals=1, args_size=1
0: iconst_1
1: ireturn
LocalVariableTable:
Start Length Slot Name Signature
0 2 0 this Lorg/apache/spark/rdd/RDD;
LineNumberTable:
line 166: 0
```
RDD.unpersist() with this.type return type:
```
public org.apache.spark.rdd.RDD<T> unpersist(boolean);
flags: ACC_PUBLIC
Code:
stack=4, locals=2, args_size=2
0: aload_0
1: new #208 // class
org/apache/spark/rdd/RDD$$anonfun$unpersist$1
4: dup
5: aload_0
6: invokespecial #209 // Method
org/apache/spark/rdd/RDD$$anonfun$unpersist$1."<init>":(Lorg/apache/spark/rdd/RDD;)V
9: invokevirtual #211 // Method
logInfo:(Lscala/Function0;)V
12: aload_0
13: invokespecial #108 // Method
sc:()Lorg/apache/spark/SparkContext;
16: aload_0
17: invokevirtual #213 // Method id:()I
20: iload_1
21: invokevirtual #217 // Method
org/apache/spark/SparkContext.unpersistRDD:(IZ)V
24: aload_0
25: getstatic #157 // Field
org/apache/spark/storage/StorageLevel$.MODULE$:Lorg/apache/spark/storage/StorageLevel$;
28: invokevirtual #160 // Method
org/apache/spark/storage/StorageLevel$.NONE:()Lorg/apache/spark/storage/StorageLevel;
31: invokespecial #186 // Method
storageLevel_$eq:(Lorg/apache/spark/storage/StorageLevel;)V
34: aload_0
35: areturn
LocalVariableTable:
Start Length Slot Name Signature
0 36 0 this Lorg/apache/spark/rdd/RDD;
0 36 1 blocking Z
LineNumberTable:
line 172: 0
line 173: 12
line 174: 24
line 175: 34
Signature: #1705 //
(Z)Lorg/apache/spark/rdd/RDD<TT;>;
public boolean unpersist$default$1();
flags: ACC_PUBLIC
Code:
stack=1, locals=1, args_size=1
0: iconst_1
1: ireturn
LocalVariableTable:
Start Length Slot Name Signature
0 2 0 this Lorg/apache/spark/rdd/RDD;
LineNumberTable:
line 171: 0
```
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