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AngularJS 1.8: implementing $watch on Nested Objects and Performance Degradation

👀 Views: 59 đŸ’Ŧ Answers: 1 📅 Created: 2025-08-30
angularjs performance watch optimization JavaScript

I need some guidance on I'm building a feature where I'm experiencing important performance optimization in my AngularJS application when using `$watch` on nested objects... My application has a complex data structure where I need to watch for changes in deeply nested properties. I'm currently using a watcher like this: ```javascript $scope.$watch('nestedObject', function(newValue, oldValue) { if (newValue !== oldValue) { // perform some action } }, true); // deep watch ``` However, I notice that this is causing a lot of digest cycles, especially when the data updates frequently. The result is a noticeable lag in the UI responsiveness. I've tried switching to `$watchCollection` to monitor only the top-level properties, but that doesn't seem to cover my requirements since I need to detect changes in deeper structures. I've also logged the performance using the Chrome DevTools and found that the digest cycles can go up to 200ms, which is unacceptable for user experience. Is there a more efficient way to handle this without losing the ability to track changes in the nested properties? I considered using `Object.observe`, but I know it's deprecated. Any suggestions or best practices would be greatly appreciated! The project is a web app built with Javascript. I'd be grateful for any help.