javascript - ng-repeat causing delay in Ionic app (Angular) -


in controller, have object (sorted_users) containing name , linkedin id of people, sorted alphabetically:

{   "a":[     {"name":"an something","linkedinid":"..."},     {"name":"arthur somethingelse","linkedinid":"..."},     {"name":"ashton lastname","linkedinid":"..."}],   "b":[     {"name":"ben blabla","linkedinid":"..."},     {"name":"bianca someone","linkedinid":"..."},     {"name":"borris random","linkedinid":"..."}, ... , on

my html:

<div ng-repeat="(letter, names) in sorted_users" class="alpha_list">     <ion-item class="item item-divider" id="index_{{letter}}">         {{letter}}     </ion-item>     <ion-item class="item-icon-right" ng-repeat="n in names | filter :{name:search}">         <h2>{{n.name}}             <i class="icon ion-social-linkedin" ng-if="n.linkedinid" ng-click="openlinkedin(n.linkedinid)"></i></h2>     </ion-item> </div>

while works, i'm getting performance issues when there +400 people. clicking on link links page people should be, results in pause of 3-4 seconds. after that, animation kicks in , app navigates people page.

i used show people without alphabet divider. array looked this:

[    {"name":"an something","linkedinid":"..."},    {"name":"arthur somethingelse","linkedinid":"..."},    {"name":"ashton lastname","linkedinid":"..."},    {"name":"ben blabla","linkedinid":"..."},    {"name":"bianca someone","linkedinid":"..."},    {"name":"borris random","linkedinid":"..."}, ... , on

and in html, use collection-repeat:

    <ion-item class="item-icon-right" collection-repeat="n in unsorted | filter :{name:search}">         <h2>{{n.name}}             <i class="icon ion-social-linkedin" ng-if="n.linkedinid" ng-click="openlinkedin(n.linkedinid)"></i></h2>     </ion-item>

this removes performance issues, doesn't allow me put alphabetical dividers.

i see 2 solutions satisfy needs:

possible solution 1:

using collection-repeat sorted_users. i'm unable work: collection-repeat expected array 'sorted_users', got undefined

possible solution 2:

showing loading spinner when clicking button, , after delay, remove again navigate page. i've tried adding controller:

$scope.gotopeople = function() {     $ionicloading.show({         content: 'processing...',         template: "<ion-spinner></ion-spinner><br />processing...",         showbackdrop: true,         showdelay: 0     });      $timeout(function () {         window.location="...link people page...";     }, 100); };

and then:

    $scope.$on('$ionicview.beforeleave', function(){         $ionicloading.hide();      });

this seems work, during delay, spinner freezes , stops "spinning". it's there, looks app crashes (which isn't case).

you can try load list in several times thanks-to 

<ion-infinite-scroll  ng-if="moredatacanbeloaded()"  on-infinite="loadmore()"  distance="1%"> </ion-infinite-scroll>

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