jQuery MultiSelect UI Widget 1.14pre

This is an issue for me with the long list. See the below image for the onload and after load effect(click on link).

I just tested a list of 1600 items on a mozilla machine and the browser locked up for about ~5 minutes.

https://camo.githubusercontent.com/3dc1a939065e6364e699eef8f08b9cd653741cf0/68747470733a2f2f662e636c6f75642e6769746875622e636f6d2f6173736574732f333439313130312f3335313235362f61636133333962652d613034322d313165322d393462382d3239396561333065663532632e706e67

Example: Suppose i need to show 1000 names in Drop Down on a web page i am using multiselect.js. when this web page is loading all the names are coming in <select><option</option></select> tags. after completing the loading this is becoming multiselect drop down.

$(function(){ $("#"+ prefix + "schedule_id").multiselect({ header: 'Travels', noneSelectedText: 'Travels', selectedText: 'Travels', prefix: prefix + 'travels', }).select2; });

** While loading the data in drop down it is flickering. as i showed in image 1) while loading the page/data. 2) After loading the page/data.
Is there any suggestion how to solve this??