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Ellie: I had a slice of ham in my hand. I was going to drop it, so I slapped it hard. It attached itself to the wall
The quality of the stuff you're loading may not have to do with the actual lag you experience. If the scripts are badly created, they could be doing a lot of needless looping very quickly: the faster your computer, the faster it loops, so you get lag either way. I'm not saying that's the cause of your problem but I've accidentally created similarly poorly-designed events in my own game and been blown away by how badly it destroys the framerate and loading speeds.