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loading large array in oi-select takes too much of time in angularjs

I am using oi-select library, i have customized it according to my project need and i have written directive for it. The problem is its taking too much of time say 10secs to load around 3k array data. I want to minimize the time for it. Here I have created plunker for this.
I have directive which loads all factory data and provides it to oi-select, in my code here is html
<small><b>select {{MPhardwaresListDropDown.length}}</b></small>
<div style="padding-top: 7px">
<div title="" class="selected-multiple-items">
{{MPselectedHardwares.length}} selected
</div>
<grid-multi-select id="hardwareId" clean="clean" optionlist="MPhardwaresListDropDown" colval="name"></grid-multi-select>
</div>
HTML code in directive looks like
<div>
<div ng-repeat="optionVal in tempOptionList | orderBy : ['-originalcheck','+label']" prevent-close>
<div ng-if="optionVal.label">
<label class="checkbox" ng-if="!typeFilterOptions || (optionVal.label.toString().toLowerCase().indexOf(typeFilterOptions.toLowerCase()) > -1)">
<input type="checkbox" name="checkbox1" ng-checked="optionVal.check" ng-model="optionVal.check"/>
<span class="checkbox__input"></span>
<span class="checkbox__label" style="color:#A9A9A9;">{{optionVal.label}}</span>
</label>
</div>
<div ng-if="!optionVal.label">
<label class="checkbox" ng-if="!typeFilterOptions || (optionVal.val.toString().toLowerCase().indexOf(typeFilterOptions.toLowerCase()) > -1)">
<input type="checkbox" name="checkbox1" ng-checked="optionVal.check" ng-model="optionVal.check" ng-change="checking(typeFilterOptions)"/>
<span class="checkbox__input"></span>
<span class="checkbox__label" style="color:#A9A9A9;">{{optionVal.val}}</span>
</label>
</div>
</div>
angular code is too big to mention in this question please refer plunker, but this is how it loops
scope.selection = scope.selectionorg;
scope.checkedall=scope.checkedallorg;
scope.OptionList=parentScope[scope.parentListName].sort();
scope.tempOptionList=[];
var i=0;
for(i=0;i<scope.OptionList.length;i++) {
scope.tempOptionList[i] = {val: scope.OptionList[i], check: false, originalcheck: false};
}
if(scope.optionListSelectedList.length>0) {
angular.forEach(scope.optionListSelectedList, function(obj){
angular.forEach(scope.tempOptionList, function(obj1){
if(obj===obj1.val){
obj1.check=true;
obj1.originalcheck=true;
}
});
});
}
else{
scope.checkedall=false;
}
};
I want something like which will load partial data on scroll it loads more data, any help will be appreciated. Thank you so much.
EDIT
Now i have edited my plunker with limitTo in ng-repeat, for that i have written new directive which will trigger addmoreitems function when scroll will reach bottom. updatedPlunker
Now problem is when i am typing and searching something its searching in only available records with respect to limitTo its not searching in all data, say now the limitTo is 50 then search is happening only in 50 records not in 3k records.

Correct way of doing this kind of requirement is to do with pagination, since you are loading data from the server side, you should make your api to support pagination.
It should accept three parameters such as number of items, start, limit and you should initially get the number of items and repeat it until you get the whole result set.
There should be another request to get the total number of items. By doing this you can retrieve all the elements at once loaded in the client side. Until that you should have a loading indicator, or you could load this data when the login process/application starts.
limitTo will not be able to help with the search , because you are limiting the results.

The problem is not the array, the browser can easly handle that, the problem is that you're rendering all the 3k DOM elements, that's really heavy work even for an actual machine, also since there is bindings in each dom element {{}} they're being watching by AngularJs, I got the same problem and solved using Virtual Repeat from AngularJS Material, what this does is it doesn't render the whole 3k DOM elements generated by the ng-repeat, instead it just renders the ones that are visible, also I've found another library if you don't want to use Angular Material, this seems to work the same way: Angular VS-Repeat

You may try the limitTo filter in ng-repeat in angularjs which takes the additional argument to start the iteration.
https://docs.angularjs.org/api/ng/filter/limitTo
On scroll, you can then change that argument based on the number of items pending or left for rendering or the number of items already rendered. This should help you in approach of selective loading of data on scroll.

AngularJS: How do I bind data in nested ng-repeats?

I've got a pretty deeply nested JSON object being returned from an $http call, using Angular. In my template, I have to nest a few ng-repeats to get present the data. I can't seem to figure out how to bind the data using ng-model on a text input.
I read this question which said that the return object isn't automatically data in the $scope, and you have to loop through the data and instantiate the structure. I tried that as well with the same outcome.
// Seemingly unnecessary code
angular.forEach(Object.keys($scope.sources), function(sourcename){
$scope.sourceData[sourcename] = {};
angular.forEach(Object.keys($scope.sources[sourcename]), function(key){
$scope.sourceData[sourcename][key] = $scope.sources[sourcename][key];
});
Here's a fiddle showing my attempts:
http://jsfiddle.net/c7z9C/2/
I just want the values to be populated in the fields and bound to the model. Thanks in advance for any advice.

The HTML in your example was just a little off.
Here is a working fiddle.
The "not working" input just has some code in the ng-model that wasn't working.
First off, you don't need to interpolate {{ }} inside Angular directive attributes. So, this includes ng-model. So the {{key}} isn't necessary.
Also, sourceData was misspelled. It was supposed to be sourcedata and case matters.
So the end result for the ng-model is ng-model="sourcedata[key]":
<li ng-repeat="(key,value) in sourcedata">
WORKS: <input type="text" value="{{value}}" /><br/>
DOESN'T: <input type="text" ng-model="sourcedata[key]" />
</li>

Bind ng-models in input type checkbox

I have a problem when binding ng-models with ng-repeat in a input tag type checkbox.
I will first attach my code and then explain more in detail.
app/main.html:
<div ng-repeat="feature in features">
<input type="checkbox" ng-model="features[$index].name">{{features[$index].name}}
</div>
<br></br>
<div class="highlighter">
<span ng-class="{emo:Emotions}">Manually</span> <span ng-class="{feel:Feelings}">create</span> the <span ng-class="{emo:Emotions}">entire</span>
</div>
main.js
angular.module('webClientApp')
.controller('MainCtrl', function ($scope,$http) {
[...other variables...]
$scope.features = [{'name':'Emotions'},{'name':'Feelings'}];
[...other parts of code]
});
Let's also assume that in the main.css file there are references to the classes .emo' and.feel' respectively to highlight the target word when the user ticks the box relative to the feature.
Now, the application works correctly when I listed all the inputs one by one like the following:
<input type="checkbox" ng-model="Emotions">Emotions
<input type="checkbox" ng-model="Feelings">Feelings
but I wanted to wrap it into an ng-repeat and list the features in the controller scope, since the features I will considered will be more. When I try the code above when I tick on the box the name changes to `true'.
I have read a lot about how to bind models to an ng-repeat inside a input tag but none of the solutions apply to my case.
Can someone please help me?

I changed thigs up quite a bit from your original model but... I did get something to behave similar to what you are looking for.
HTML
<div ng-app="webClientApp">
<div ng-controller="MainCtrl">
<div ng-repeat="(feature,enabled) in features">
<input type="checkbox" ng-model="features[feature]">{{feature}}</input>
</div>
<div class="highlighter">
<span ng-class="{emo:features.Emotions}">Manually</span> <span ng-class="{feel:features.Feelings}">create</span> the <span ng-class="{emo:features.Emotions}">entire</span>
</div>
{{features}}<br>
{{features.Emotions}}<br>
{{features.Feelings}}
</div>
JS
var app = angular.module('webClientApp', []);
app.controller('MainCtrl', function($scope, $http) {
$scope.features = {Emotions: true, Feelings: true};
});
Here's the fiddle: http://jsfiddle.net/rodhartzell/8YrxQ/
Hope this helps.

(i should add this as a comment, but I don't have enough rep. yet)
There is an issue on github which concerns your issue: https://github.com/angular/angular.js/issues/1404 and the comment of caitp shows some workarounds: https://github.com/angular/angular.js/issues/1404#issuecomment-30859987
You could (also) define a new javascript object in your controller and map the elements to that.
In controller: $scope.awnsers = {};
In template: ng-model="awnsers[feature.name]"
I hope this helps

You must use ng-checked instead of ng-model.
Check out this jsfiddle
http://jsfiddle.net/fizerkhan/z5z9s/24/
ngModel and ngChecked are not meant to be used together.
ngChecked is expecting an expression, so by saying ng-checked="master". If the expression is truthy, then special attribute "checked" will be set on the element
You should be able to just use ngModel, tied to a boolean property on your model. If you want something else, then you either need to use ngTrueValue and ngFalseValue (which only support strings right now), or write your own directive.

One way binding + dynamic binding in AngularJS

I will start by explaining what we are trying to achieve.
We have just jumped on the Angular bandwagon and are building a prototype with it to see what it is capable of.
Currently there is a load of data (grades in this case) on the server and we display that data using Angular.
The following is the code we use:
<ul class="phones">
<li class="list-group-item" onclick="toggleExpandedView(this, true, 500)" ng-repeat="grade in grades | filter:query | orderBy:orderProp">
<span ng-show="grade.comment"><img src="../Content/images/comment.gif"/></span>
<a class="btn btn-primary editButton" style="float: right; position: absolute; right:10px;" ng-href="#/grades/{{grade.gradeId}}">Edit</a>
<div class="heading1"><a ng-href="{{grade.url}}" target="_blank">{{grade.gradeValue}}</a></div>
<div>Provided by {{grade.assessorFirstname}} {{grade.assessorLastname}} on {{grade.dateModifiedFormatted}} </div>
<div class="expandedGrade" onclick="childDivClick(event)" style="display: none" id="grade-{{grade.gradeId}}">
<label>Attachments</label>{{grade.attachmentCount}}
<br />
<span ng-hide="editing" ng-click="editing = true"><b>{{grade.comment || 'No comments yet'}}</b></span>
<form ng-show="editing" ng-submit="editing = false">
<input type="text" ng-model="grade.comment" placeholder="Comment" ng-required />
<br />
<input id="saveChanges" type="submit" class="btn btn-primary" ng-click="saveChanges(this, grade)" text="Save changes" />
</form>
</div>
</li>
</ul>
As you can see we have a parent ul and for each grade in grades we simply display a li and a div that is hidden and when you click on the li we use jQuery to animate and display the hidden div. In the child div we have a comments field which users can update and click save. On save the current object gets fired back to the server however we are concerned about the fact that Angular has to go through all 2000 grades until it finds the one we are updating (due to two way binding) and this means that everything will be really slow and we cannot afford that.
This is what we want to achieve:
1 We want to bind the data one way so that we can display the list of all grades on the screen and as soon as they are all displayed we want to somehow remove the bindings.
2. When users update the comments for a particular grade we then want to dynamically bind that particular grade so that Angular knows exactly which one it has to update without having to go through the whole collection of 2000+ grades.
I have find a tutorial however I am still unsure how to integrate that into my code.
I have also watched this video and I understand the concept behind it but again, I am struggling to write something that actually works ( we have just started using Angular so I am pretty much a newbie)
Could anyone out there point me in the right direction and provide me with some code samples that would solve the issue we are facing? Any advice and help would be greatly appreciated

You could always use a directive
The logic should go like this
use a service to hold your grades
inject the service into your directive
make a copy and just bind the 'read only view' in your directive
you could watch the service for changes and makes updates as needed
in your directive
as far a lazy loading / updating when needed - use a data service
and call the data service for an update whenever the trigger fires
if your trigger needs to come as a push from some other 'web service' consider a technology
like http://socket.io/
I can put together an example if you would like to see how the services and directives should interact

KnockoutJs - handling several areas with the same fields

I have several regions with repeatable content which is generated on the server-side. I use knockout-js to dynamically hide/show regions within areas. My markup is like the following:
<div>
<input type="checkbox" data-bind="checked: a1" />
<div data-bind="visible: a1">region0</div>
</div>
<div>
<input type="checkbox" data-bind="checked: a2" />
<div data-bind="visible: a2">region1</div>
</div>
<script>
var viewModel = {
a1: ko.observable(false),
a2: ko.observable(false)
};
ko.applyBindings(viewModel);
</script>
Lets say I have 10 such regions. Is there a more convenient/better way to achieve the same?
Lets say, that I explicitly do not want to use foreach binding and generate markup on the client (for site to be accessible with disabled js).
Is there any way to omit viewModel specification (part within script tags), since it feels to me that knockout could detect and auto-create fields for me?
P.S. I'm a JS-novice, so excuse me for simple questions :)

Is there any way to omit viewModel specification (part within script tags), since it feels to me that knockout could detect and auto-create fields for me?
Although I prefer Knockout personally, you might want to take a look at Angular. Angular does automatically create view model properties as this example shows.