Which is more Efficient array.forEach or angular.forEach?

Question

array.prototype.forEach

forEach() executes the provided callback once for each element present in the array in ascending order. It is not invoked for index properties that have been deleted or are uninitialized (i.e. on sparse arrays).

Source: https://developer.mozilla.org/enUS/docs/Web/JavaScript/Reference/Global_Objects/Array/forEach

angular.forEach

Invokes the iterator function once for each item in obj collection, which can be either an object or an array. The iterator function is invoked with iterator(value, key, obj), where value is the value of an object property or an array element, key is the object property key or array element index and obj is the obj itself. Specifying a context for the function is optional.

Source: https://docs.angularjs.org/api/ng/function/angular.forEach

But I want to know which one is more efficient and the performance.

Answer 1

AngularJS forEach used to implement ES5 forEach if available, which was not the fastest, but since this commit it is using the fastest for loop.

https://angularjs.de/buecher/angularjs-cookbook/es5-array-functions

If you look at this comparison, you see, that the ES5 forEach implementation is not the fastest. The AngularJS version in this comparison uses ES5 forEach, if it’s available. This is changed by this commit. Now it’s always using the fastest for loop.

• https://jsperf.com/angular-foreach-vs-native-for-loop/148