What are the best practices for optimizing AngularJS directives?

Use the bindToController property.: This property allows you to bind the directive's scope to a controller, which can help to improve performance. Avoid using ng-repeat inside of directives.: ng-repeat can cause the digest cycle to run multiple times, which can slow down the application. Use the isolateScope property.: This property creates a new scope for the directive, which can help to prevent scope pollution. Use the restrict property to specify how the directive should be used.: This can help to improve performance and make the code easier to read.

Аngularjs was long ego eveloped to be angular , and angular released lot of versions(version 16 currently) So, there is sure be performance improvement if uprade to newest angular version...

->Lazy Load Templates: Use $templateCache for better loading. ->Minimize Watchers: Keep expressions light to speed up digest cycles. ->Use One-Time Bindings: :: reduces watchers for static data ->Debounce Events: Reduce load on frequent actions like scroll/resize.

For scenarios where data changes frequently, you can throttle or debounce watchers using custom services to limit how often they trigger. Two-way bindings add watchers to both the parent and the directive scopes and should be avoided unless needed.

Implementing the controllerAs syntax in AngularJS enhances code readability and modularity. By using the controller instance (this) instead of $scope, we achieve a cleaner separation of concerns, facilitating easier maintenance and testing. This approach aligns with modern architectural principles, promoting encapsulation and simplifying data binding within views.

Avoid direct DOM manipulation to maintain separation of concerns and enhance maintainability. Leverage AngularJS directives for DOM interactions, ensuring logic resides within controllers and services. This promotes a cleaner architecture, improves testability, and aligns with best practices for modern web application development.

Utilize bindToController in AngularJS directives to bind scope properties directly to the controller instance. This practice encapsulates directive logic within the controller, ensuring a more modular, testable, and maintainable architecture. It aligns with modern development principles, promoting clean separation of concerns and enhancing component-based design.

Prefer Refactoring AngularJS with Modern Javascript frameworks like React JS, This refactoring gives more benefits in long term. Do a UX improvement and release new version of the App which is using latest frameworks and move out of AngularJS

My best advice here is to Avoid using AngularJS as it is a deprecated Javascript framework since January 2022 ?? Consider refactoring your project to Vue.js or to Qwik frameworks.