Flutter's widget system how does it achieve performance optimization? For example, when the widget tree is rebuilt, what mechanisms speed up the rendering process? What methods are recommended for rerender optimization? In your opinion, what should we pay attention to in this regard?
How do you optimize the performance of Flutter widgets?
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I remember struggling with widget rebuilds at first too. The key trick I found was to wrap heavy widgets with `const` constructors—it skips rebuilding them entirely if the parent widget doesn't change. Also, using `ListView.builder()` instead of a regular `Column` with many children made a huge difference in scroll performance for me. Just make sure to pass the correct `itemCount` and reuse widget logic smartly!