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?

Two function invocations take probably more time than one function invocation. However, the performance difference will most likely be negligible. — Felix Kling, Oct 22 '14 at 16:14
testIt and testIt2 are not at all the same function, even if they will perform the same in this example. Apples and Oranges. Since there is no 'not relevant/not interesting' tag, i suggest closing as too broad. — GameAlchemist, Oct 22 '14 at 16:18
Why call a `testIt` function at all? Just directly do only `alert('hi test')`, it will be much faster. — Bergi, Oct 22 '14 at 16:22
testIt2 function should be faster as testit has overhead of putting another function on call stack.But difference should be negligible. — WebServer, Oct 22 '14 at 16:23

score 0 · Answer 1 · answered Oct 22 '14 at 16:23

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.

1 Answers1