Resizing characters with Layered Clothing seems to cause extreme lag spikes on the client. Doing so in Studio is less significant but still somewhat noticeable. I noticed this when someone else in my game resized their character and it completely froze my game for atleast 3 seconds. This is a big problem for my me because I have multiple Clones which will resize with your player.
Resizing without Layered Clothing has pretty much 0 lag. I don’t expect Layered Clothing to be perfect or 100% lag free but maybe some what better than this? I don’t really understand why in Studio it’s not that bad but once it’s in a live game it is extremely bad.
When did this start happening? How are you scaling the player? If it’s been happening forever, this is a known issue which @LoboTheCzarnian has been working to address. See my reply to a similar report:
If it only started occurring recently (which I doubt) it may be a result of a recent change.