UI freezes for ~200ms during typing when Activate completion is Always

• Open a file with many completion candidates.
• Type somewhere.
• Notice the editor freezes occasionally.

This might look a short operation, but in my project it is even longer (we have a bunch of unneeded includes, resulting in many potential completion items for 3 characters), and even with Qt Creator it is irritating.

Attached an example. Notice that msg is typed normally, while cann appears at once after freezing.