My impression is that Angular-specific issues are way more important than pure Javascript speed concerns in terms of relative impact on an application. Number of watchers and ng-repeat declarations are the most important aspect of an AngularJS application.
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This is still fairly applicable for the major causes of speed and slowness.
https://www.exratione.com/2013/12/considering-speed-and-slow...
My impression is that Angular-specific issues are way more important than pure Javascript speed concerns in terms of relative impact on an application. Number of watchers and ng-repeat declarations are the most important aspect of an AngularJS application.