Questions And Answers

More Tutorials

Angular Performance Profiling

All About Profiling

What is Profiling?

By definition Profiling is a form of dynamic program analysis that measures, for example, the space (memory) or time complexity of a program, the usage of particular instructions, or the frequency and duration of function calls.

Why is it necessary?

Profiling is important because you can’t optimise effectively until you know what your program is spending most of its time doing. Without measuring your program execution time (profiling), you won’t know if you’ve actually improved it.

Use the following code to manually find out the number of watchers in your angular app

(function() {
 var root = angular.element(document.getElementsByTagName('body')),
 watchers = [],
 f = function(element) {
 angular.forEach(['$scope', '$isolateScope'], function(scopeProperty) {
 if( && {
 angular.forEach([scopeProperty].$$watchers, function(watcher) {
 angular.forEach(element.children(), function(childElement) {
 // Remove duplicate watchers
 var watchersWithoutDuplicates = [];
 angular.forEach(watchers, function(item) {
 if(watchersWithoutDuplicates.indexOf(item) < 0) {


In this page (written and validated by ) you learned about AngularJS Performance Profiling . What's Next? If you are interested in completing AngularJS tutorial, your next topic will be learning about: AngularJS Debugging.

Incorrect info or code snippet? We take very seriously the accuracy of the information provided on our website. We also make sure to test all snippets and examples provided for each section. If you find any incorrect information, please send us an email about the issue:

Share On:

Mockstacks was launched to help beginners learn programming languages; the site is optimized with no Ads as, Ads might slow down the performance. We also don't track any personal information; we also don't collect any kind of data unless the user provided us a corrected information. Almost all examples have been tested. Tutorials, references, and examples are constantly reviewed to avoid errors, but we cannot warrant full correctness of all content. By using, you agree to have read and accepted our terms of use, cookies and privacy policy.