Is Sending an Object to a Function in the Same Scope Inefficient?

Is there a noticeable delay when passing around an object within the same scope? Let's explore Option 1 and Option 2. In Option 1, we work directly with the object, while in Option 2 we follow better encapsulation practices. However, if we were to still pass the object within the same scope, would it be slower (considering large arrays of objects with numerous properties)? 

var sampleObject = {id:2, objString = 'something'};

Option 1:

function addPropToObject(){
 sampleObject.someNewProp = 'lalala'
}

Option 2:

function addPropToObject(obj){
 obj.someNewProp = 'lalala'
}

addPropToObject(sampleObject);

The presence of the AngularJs tag is included in case the function was:

$scope.adPropToObject = function(){....

In my opinion, it shouldn't make any difference. Feel free to suggest a new title if you have one in mind.

javascriptangularjs

Answer №1

The performance of these two options can vary depending on how the JS engine is designed. Option 1 might experience slower execution as it needs to navigate through different scopes to locate sampleObject. On the other hand, option 2 could be slower due to the additional stack operations required to handle sampleObject when accessing obj. To accurately measure their speed, you can create a benchmark using jsPerf and observe the response times for yourself.

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