double function bytecode in clojure 1.6

double.txt

(defn double [n] (* 2 n))

public final class user$double extends clojure/lang/AFunction  {

  // compiled from: NO_SOURCE_FILE
  // debug info: SMAP
NO_SOURCE_FILE.java
Clojure
*S Clojure
*F
+ 1 NO_SOURCE_FILE
NO_SOURCE_PATH
*L
0#1,1:0
*E

  // access flags 0x19
  public final static Lclojure/lang/Var; const__0

  // access flags 0x19
  public final static Ljava/lang/Object; const__1

  // access flags 0x9
  public static <clinit>()V
   L0
    LINENUMBER 1 L0
    LDC "clojure.core"
    LDC "*"
    INVOKESTATIC clojure/lang/RT.var (Ljava/lang/String;Ljava/lang/String;)Lclojure/lang/Var;
    CHECKCAST clojure/lang/Var
    PUTSTATIC user$double.const__0 : Lclojure/lang/Var;
    LDC 2
    INVOKESTATIC java/lang/Long.valueOf (J)Ljava/lang/Long;
    PUTSTATIC user$double.const__1 : Ljava/lang/Object;
    RETURN
    MAXSTACK = 0
    MAXLOCALS = 0

  // access flags 0x1
  public <init>()V
   L0
    LINENUMBER 1 L0
   L1
    ALOAD 0
    INVOKESPECIAL clojure/lang/AFunction.<init> ()V
   L2
    RETURN
    MAXSTACK = 0
    MAXLOCALS = 0

  // access flags 0x1
  public invoke(Ljava/lang/Object;)Ljava/lang/Object;
   L0
    LINENUMBER 1 L0
   L1
    LINENUMBER 1 L1
    LDC 2
    ALOAD 1
    ACONST_NULL
    ASTORE 1
    INVOKESTATIC clojure/lang/Numbers.multiply (JLjava/lang/Object;)Ljava/lang/Number;
   L2
    LOCALVARIABLE this Ljava/lang/Object; L0 L2 0
    LOCALVARIABLE n Ljava/lang/Object; L0 L2 1
    ARETURN
    MAXSTACK = 0
    MAXLOCALS = 0
}