arguments.callee is slower than a named function

arguments-callee.js

var index;

function test (method) {
  index = 0;
  var start = new Date;
  var i = 1000000;
  while (--i) method();
  console.log(new Date - start);
}

test(function named () {
  named.k = index++;
})

test(function(){
  arguments.callee.k = index++;
})

-----------------------
// results
-----------------------
named:            16ms
arguments.callee: 30ms