Are you reporting a feature or a bug?

Bug

Check if the issue is already reported

• https://dev.ckeditor.com/ticket/16869
• https://dev.ckeditor.com/ticket/12307
• http://dev.ckeditor.com/ticket/11010
• http://dev.ckeditor.com/ticket/13123

Provide detailed reproduction steps (if any)

1. Open AJAX sample in Chrome with dev tools enabled and set to memory tab
2. Create editor and take a memory snapshot.
3. Destroy editor and take memory snapshot
4. Repeat steps 2 & 3 few times

Expected result

Everything or almost everything is released.

NOTE: From what I remember getData should work after destroying the editor and should return actual editor data (I don't remember what was the exact reason behind it though).

Actual result

There are a lot of DOM objects being left behind.

• Browser: Any
• OS: Any
• CKEditor version: at least from 3.0
• Installed CKEditor plugins: N/A