The app slows to a crawl when a lot of people are on it, and I can make it a little better each time. But finding the real chokepoint feels like searching a dark room. I try a fix, it helps a bit, then the slowness pops up somewhere else. I can keep things limping along; I just can't reliably find the thing that's actually holding us back.
More people experience this than they realize.
You can ease the slowness but can't reliably find what's really choking it.
If this sounds familiar, the Library can help you find the bigger picture.