I keep hearing about the fact that welds can cause lag, and after searching the DevForum for concrete answers, I could not find any. That is why I created this post so my question can be answered.
So, to sum it all up, do welds cause unnecessary lag?
They definitely do if abused.
A few previous games had to be cancelled because there was a “Part Terrain Joint” weld in the roads, and I didn’t notice it until it was too late. There were thousands of these in the road parts. No wonder such a small map lagged that much.
Luckily for our current project, we made a script that removes all instances named like that.