污染 $scope 对象会影响性能吗? [英] Does polluting the $scope object affect performance?

问题描述

我有一个控制器，其中 $scope 对象已用于存储仅在同一控制器内本地使用的方法和值.发生了很多这样的事情:

I have a controller where the $scope object has been used to store methods and values that are only used locally within the same controller. There is a lot of this going on:

$scope.foo = 'something';
$scope.bar = 'something else';

...等等.在视图中没有使用这些值.我的问题是污染 $scope 对象会影响性能吗?清理它以便只有视图所需的值和方法包含在 $scope 对象中是个好主意吗?

... and so on. None of these values are used within the view. My question is does polluting the $scope object affect performance? Is it a good idea to clean this up so only values and methods needed for the view are contained in the $scope object?

推荐答案

是的，污染 $scope 确实会影响性能，但这取决于您的范围有多个经常更改的观察者，这将创建一个更多的管理费用.请参阅这个答案，其中涵盖了相同的观点

Yes, Polluting $scope does affect performance, but its depends your scope has multiple watchers which are frequently changing then that will create a more overhead cost. Refer this answer which has covered same point

为了避免这种情况，我建议您对代码进行良好的重构

For avoiding this situation I'd suggest you to do good re-factoring of code

在需要时处理控制器中的所有逻辑，否则通过充分利用每个组件来分离逻辑.

Handle all the logic in controller whenever required otherwise do separate a logic by making good use of each component.

1. 将通用方法(逻辑)移到service/factory/provider 中，多处使用，方便共享.
2. 如果某些值是固定的，它们不会改变，然后将它们移动到 constant/value
3. 每当您觉得自己有相同的逻辑需要保留在 $scope 中时，它就会将该逻辑移动到公共控制器中.需要时，您可以使用 $controller 注入器
在当前控制器范围内注入

1. Move common method(logic) to service/factory/provider which is used in multiple place, so that it would be sharable.
2. If some value are fixed, they are not gonna change then move them to constant/value
3. Whenever you feel like you have same logic which needs to be keep in $scope it self then move that logic to common controller. When required you could inject in your current controller scope using $controller injector

另请参阅对作用域的理解 清楚地了解范围的使用

Also refer Understanding Of Scope for clear understanding of use of scope

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