Passing function as arguments in javascript benchmark [passing function vs direct acces]

Question

well i'm building some javascript code and im just curious about benchmark of passing function in argument vs direct access

I got following functions

testIt(function(){
    alert('Hi test');
});

function testIt(func){
    func();
};

function testIt2(){
    alert('Hi test');
};

And now how about testIt vs testIt2? Would testIt be slower?

Answer 1

I test it on jspref and here is my result:

Anonymous call have the same speed with direct call. But creating function on fly work ~80% slower.

So if you want to run some code in cycle — first define function and than pass it anonymously. It give enough readability and speed.