Node Anonymous Function Vs Named Functions

anonymous.js

var globalTime = new Date().getTime();
var b = function(callback){
        var date = new Date().getTime();
        for (var i=0;i<10000;i++)
                callback();
        console.log("Completed a function test in", new Date().getTime()-date);
}
b(function(){
	var date = new Date().getTime();
        //console.log("Started A at:", date-globalTime);
        for(var i=0;i<=12000;i++){
                var obj = Object.create({});
                delete obj;
        }
	//console.log("Done A", new Date().getTime()-date);
});

b(function(){
	var date = new Date().getTime();
        //console.log("Started B at:", date-globalTime);
        for (var i=0;i<12000;i++){
                var obj = Object.create({});
                delete obj;
        }
	//console.log("Done B", new Date().getTime()-date);
});

console.log("Program End at", new Date().getTime()-globalTime);

named.js

var globalTime = new Date().getTime();
var a = function(){
        var date = new Date().getTime();
        //console.log("Started A at:", date-globalTime);
        for(var i=0;i<=12000;i++){
                var obj = Object.create({});
                delete obj;
        }
	//console.log("Done A", new Date().getTime()-date);
}

var c = function(){
        var date = new Date().getTime();
        //console.log("Started B at:", date-globalTime);
        for (var i=0;i<12000;i++){
                var obj = Object.create({});
                delete obj;
        }
	//console.log("Done B", new Date().getTime()-date);
}

var b = function(callback){
        var date = new Date().getTime();
        for (var i=0;i<10000;i++)
        callback();
        console.log("Completed a Function Test in", new Date().getTime()-date);
}
console.log("Defined Everything in", new Date().getTime()-globalTime);
b(a);
b(c);
console.log("Program End at", new Date().getTime()-globalTime);

Just for fun, I executed a same type of test for just anonymous function in php

<?php
$time = time();
class myClass{
        public function __construct($callback){
                $callback(1);
        }
}
class testClass{
        public function __contruct($value){
                $value++;
        }
}
$callback = function($i){
        for ($i=0;$i<12000;$i++){
                $object = new testClass($i);
        }
};

for ($i=0;$i<10000;$i++)
        $obj = new myClass($callback);

echo "It took :".time()-$time."ms";

and the results might mesmerise you:

It took :18ms
real    0m17.837s
user    0m17.762s
sys     0m0.044s

Nothing more to justify the amount of degradation of performance in JavaScript.