🧒 Explain like I'm 5
Imagine building a house: first, you draw the plan (layout), then you build the walls (paint), and finally, you decorate it (composite). If you keep changing the plan while building, it slows everything down. Similarly, the browser has steps to show a webpage, and changing things too often makes it slower.
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Senior-level deep dive: internals, pitfalls, and a self-interview ladder.
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