Javascript performance/memory in angular with passing objects around?

Asked Mar 06 '15 at 23:27

Active Mar 06 '15 at 23:33

Viewed 72 times

I have a large object, and I mean large with multiple keys and values. Out of the cases below, which would be most performant and less memory intensive, or does it matter?

Global Variable Here

var sample = {"keya":"value-a-is-a-huge-nested-map","keyb":"valueb",...many-other-key-value-pairs }

CASE A

doSomething(sample.keya);
function doSomething(testobject) {
    // 1. do manipulation on it to return a result
}

CASE B

doSomething(a.keya);
function doSomething(key) {
    // 1. extract the specific key from "sample"
    // 2. do a lookup on the value from "sample"
    // 3. do manipulation on it to return a result
}

Now imagine the same case above, but replace the function calls with $scope.$emit and $scope.$on instead of just plain function calls. Is it safe to assume that using Case 2 is better because your not "emitting" over the value of a large object?

edited Mar 06 '15 at 23:33

asked Mar 06 '15 at 23:27

Rolando

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You're passing references. – Dave Newton Mar 06 '15 at 23:30
Objects in Javascript are passed by pointer so no copy is created when they are passed to a function. It is very efficient to pass an object to a function. – jfriend00 Mar 07 '15 at 00:47
http://stackoverflow.com/questions/7744611/pass-variables-by-reference-in-javascript – Zafer Mar 07 '15 at 02:45

Javascript performance/memory in angular with passing objects around?

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