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September 18, 2014 14:31
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Node Anonymous Function Vs Named Functions
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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); |
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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.
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I will update with GC and other internal stuff when I get dTrace or SystemTap on my system, as of now quite busy for it.