在oi-select中加载大数组会在angularjs中花费太多时间

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 I am using oi-select library, i have customized