https://stackoverflow.com/questions/45009435/debouncing-ember-search-input

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
    appName: 'Ember Twiddle',
});

controllers.users.js

import Ember from 'ember';
export default Ember.Controller.extend({
  queryParams:['easyFilter'],
  easyFilter:'',
  setEasyFilterLazily(value){
    this.set('easyFilter',value);
  },
  actions:{    
     handleEasyFilterEntry(value){
      console.log('handleEasyFilterEntry',value);      
      Ember.run.debounce(this, this.setEasyFilterLazily,value, 500);
    }
  }
});

router.js

import Ember from 'ember';
import config from './config/environment';

const Router = Ember.Router.extend({
  location: 'none',
  rootURL: config.rootURL
});

Router.map(function() {
  this.route('users');
});

export default Router;

routes.application.js

import Ember from 'ember';

export default Ember.Route.extend({  
});

routes.users.js

import Ember from 'ember';

export default Ember.Route.extend({
  queryParams:{easyFilter:{refreshModel:true}},
  model(params){
    console.log('params ',params);
    return 'test';
  }
});

templates.application.hbs

<h1{{action 'changeEasy'}}>Welcome to {{appName}}</h1>
<br>
{{#link-to 'users' (query-params easyFilter="easy")}} Users {{/link-to}}
<br>
{{outlet}}
<br>
<br>

templates.users.hbs

<input value={{easyFilter}} onKeyUp={{action 'handleEasyFilterEntry' value="target.value"}} />
{{easyFilter}}

twiddle.json

{
  "version": "0.12.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.12.0",
    "ember-template-compiler": "2.12.0",
    "ember-testing": "2.12.0"
  },
  "addons": {
    "ember-data": "2.12.1"
  }
}