Is Kotlin's T?.apply{...} slow?

Test1.kt

class Holder : HashMap<String, String>()

class PrefKey(private val key: String) {
    fun put(holder: Holder, value: String) {
        holder[key] = value
    }
}

fun Holder.putA(pref: PrefKey, value: String): Holder {
    pref.put(this, value)
    return this
}

fun Holder.putB(pref: PrefKey, value: String): Holder =
    apply {
        pref.put(this, value)
    }

fun main() {
    val repeats = 1..1000000000
    val pref = PrefKey("foo")
    bench("putA") {
        val holder = Holder()
        for (i in repeats) {
            holder.putA(pref, "zap")
        }

    }
    bench("putB") {
        val holder = Holder()
        for (i in repeats) {
            holder.putB(pref, "zap")
        }
    }
}

fun <T : Any?> bench(caption: String, body: () -> T): T {
    val start = System.currentTimeMillis()
    try {
        return body()
    } finally {
        val end = System.currentTimeMillis()
        println("${end - start}ms $caption")
    }
}

/*

    1522ms putA
    4242ms putB

   @NotNull
   public static final Holder putA(@NotNull Holder $this$putA, @NotNull Pref pref, @NotNull String value) {
      Intrinsics.checkParameterIsNotNull($this$putA, "$this$putA");
      Intrinsics.checkParameterIsNotNull(pref, "pref");
      Intrinsics.checkParameterIsNotNull(value, "value");
      pref.put($this$putA, value);
      return $this$putA;
   }

   @NotNull
   public static final Holder putB(@NotNull Holder $this$putB, @NotNull Pref pref, @NotNull String value) {
      Intrinsics.checkParameterIsNotNull($this$putB, "$this$putB");
      Intrinsics.checkParameterIsNotNull(pref, "pref");
      Intrinsics.checkParameterIsNotNull(value, "value");
      boolean var4 = false;
      boolean var5 = false;
      int var7 = false;
      pref.put($this$putB, value);
      return $this$putB;
   }
*/

z bytecode.txt

  // access flags 0x19
  public final static putA(LHolder;LPrefKey;Ljava/lang/String;)LHolder;
  @Lorg/jetbrains/annotations/NotNull;() // invisible
    // annotable parameter count: 3 (visible)
    // annotable parameter count: 3 (invisible)
    @Lorg/jetbrains/annotations/NotNull;() // invisible, parameter 0
    @Lorg/jetbrains/annotations/NotNull;() // invisible, parameter 1
    @Lorg/jetbrains/annotations/NotNull;() // invisible, parameter 2
   L0
    LINENUMBER 10 L0
    ALOAD 1
    ALOAD 0
    ALOAD 2
    INVOKEVIRTUAL PrefKey.put (LHolder;Ljava/lang/String;)V
   L1
    LINENUMBER 11 L1
    ALOAD 0
    ARETURN
   L2
    LOCALVARIABLE $this$putA LHolder; L0 L2 0
    LOCALVARIABLE pref LPrefKey; L0 L2 1
    LOCALVARIABLE value Ljava/lang/String; L0 L2 2
    MAXSTACK = 3
    MAXLOCALS = 3

  // access flags 0x19
  public final static putB(LHolder;LPrefKey;Ljava/lang/String;)LHolder;
  @Lorg/jetbrains/annotations/NotNull;() // invisible
    // annotable parameter count: 3 (visible)
    // annotable parameter count: 3 (invisible)
    @Lorg/jetbrains/annotations/NotNull;() // invisible, parameter 0
    @Lorg/jetbrains/annotations/NotNull;() // invisible, parameter 1
    @Lorg/jetbrains/annotations/NotNull;() // invisible, parameter 2
   L0
    LINENUMBER 15 L0
    ALOAD 0
    ASTORE 3
   L1
    ICONST_0
    ISTORE 4
   L2
    ICONST_0
    ISTORE 5
   L3
    ALOAD 3
    ASTORE 6
   L4
    ICONST_0
    ISTORE 7
   L5
    LINENUMBER 16 L5
    ALOAD 1
    ALOAD 6
    ALOAD 2
    INVOKEVIRTUAL PrefKey.put (LHolder;Ljava/lang/String;)V
   L6
    LINENUMBER 17 L6
   L7
    NOP
   L8
    LINENUMBER 15 L8
   L9
    ALOAD 3
   L10
    LINENUMBER 17 L10
    ARETURN
   L11
    LOCALVARIABLE $this$apply LHolder; L4 L7 6
    LOCALVARIABLE $i$a$-apply-Test1Kt$putB$1 I L5 L7 7
    LOCALVARIABLE $this$putB LHolder; L0 L11 0
    LOCALVARIABLE pref LPrefKey; L0 L11 1
    LOCALVARIABLE value Ljava/lang/String; L0 L11 2
    MAXSTACK = 3
    MAXLOCALS = 8