Who has an example (actual code) where "unnecessary rerenders" are a problem? People often bring up this concern to me and I've yet to see a situation where the unnecessary rerendering was the real problem...
The widgets were probably reusable to an extent - they were visually very similar. I'm not sure what you're meant to do in this kind of situation.
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Would setting unique keys have helped with this?
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The keys were different. It was different data - just the same UI elements.
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