Here is a quick example I came up with for the time being. (Download Example: Link)
How to reproduce:
- Open In C3
- Run preview or export+upload as HTML5 (optionally enable fullscreen using F11 key)
- Enable "Spawn Auto" mode
- Notice occasional jank caused by GC
(Edit: No clue why half my post was missing but ok.)
This is interesting. I tried your example and... it´s not janking. The autorunner on the other hand is janking almost like a clockwork. This got me thinking... where is the difference? First I nuked the entire event sheet of the autorunner, the jank was gone. After un-nuking it and more carefully killing off event after event I was left with a single event, with a single action.
(Duh, why can´t I add more than one image to a post :V)
Anyway, after replacing the regular text object with a spritefont, the jank is entirely gone (apart from two janks right at the beginning) Could that be it?