Where to instantiate controllers in Backbone Marionette? - oop

Question

In my application I got controllers in every module, working as mediators.
What would be the better place to instantiate them:
In main controller like this:
App.MainController = Marionette.Controller.extend({
doSomething: function(){
var controller = new App.Module1.Controller();
controller.doSomething();
...
},
doSomethingElse: function(){
var controller = new App.Module1.Controller();
controller.doSomethingElse();
...
}
});
or in initialize method of the modules like this:
Module1.addInitializer(function(){
Module1.controller = new Controller({
...
});
});
and call it from main controller:
doSomething: function(){
App.Module1.controller.doSomething();
},
doSomethingElse: function(){
App.Module1.controller.doSomethingElse();
},
Is it better to have one global instances of controllers, or create them every time they are needed?
I'm confused.
Appreciate any suggestions.

Answer 1

I guess that your question is more general than just for controllers.
My preference is that you should only use global instance if there is a need to share across different modules and the data need to be persisted across operations.
If there are no such needs, you should not waste resources to have them around. Plus the less global instances your have, the more easily to maintain resources in your app.
Hope that help!