Javascript 在路由器操作中加载组件与在路由器初始化之前加载组件的优缺点

这样做的缺点/优点是什么：

define(function(require) {
    var $ = require('jquery'), Backbone = require('backbone'), $content = $("#content");

    return Backbone.Router.extend({
        routes: {
            "":                 "home",
            "employees/:id":    "employee"
        },

        home: function() {
            require(["app/views/Home"], function (HomeView) {
                var view = new HomeView({el: $content});
                view.render();
            });
        },

        employee: function(id) {
            require(["app/views/Employee", "app/models/Employee"], function (EmployeeView, Employee) {
                var employee = new Employee({id: id});
                employee.fetch({
                    success: function (data) {
                        var view = new EmployeeView({model: data, el: $content});
                        view.render();
                    }
                });
            });
        }
   });
});

在这上面：

define(function(require) {
    var $ = require('jquery'), Backbone = require('backbone'), $content = $("#content");

    return Backbone.Router.extend({
        routes: {
            "":                 "home",
            "employees/:id":    "employee"
        },

        home: function() {
            require(["app/views/Home"], function (HomeView) {
                var view = new HomeView({el: $content});
                view.render();
            });
        },

        employee: function(id) {
            require(["app/views/Employee", "app/models/Employee"], function (EmployeeView, Employee) {
                var employee = new Employee({id: id});
                employee.fetch({
                    success: function (data) {
                        var view = new EmployeeView({model: data, el: $content});
                        view.render();
                    }
                });
            });
        }
   });
});

（注意第4-6行）

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选项2将在应用程序启动时将所有依赖项加载到内存中（无论是否使用）；选项1将在调用路由和需要模块时动态加载依赖项

选择1对我来说似乎更好