Fix VM memory allocation optimizations by reducing what we allocate on the heap

internal/builtins/split.go

@@ -17,16 +17,16 @@ func Split(args ...object.Object) object.Object {
 	}
 
 	var sep string
-	s := args[0].(*object.String).Value
+	s := args[0].(object.String).Value
 
 	if len(args) == 2 {
-		sep = args[1].(*object.String).Value
+		sep = args[1].(object.String).Value
 	}
 
 	tokens := strings.Split(s, sep)
 	elements := make([]object.Object, len(tokens))
 	for i, token := range tokens {
-		elements[i] = &object.String{Value: token}
+		elements[i] = object.String{Value: token}
 	}
 	return &object.Array{Elements: elements}
 }