I am using CKeditor 4.6 version and load content using setData method. In my case, a file size is 3MB and more than 38k tags hang and take time to move when I click inside the editor. Also it take more time to reflect what I type inside the editor. But when I tired open same file in online demo, it is working fine without any time delay. and I am used selectionchange, keydown, keyup events in my custom plugins. How to figure out the problem ? Is there any criteria that this would is happen?