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Deshansh Garg on Instagram: "### 1. Instagram Never Loads Everything at Once Your app only loads 10–20 posts at a time. As soon as you reach the last 3–4 posts → it silently triggers a background API call to fetch the next batch. You think it’s infinite. It’s actually small, continuous chunks. --- ### 2. Ranking Engine Picks the “Next Best Content” Instagram doesn’t send random posts. Every time you scroll, Instagram re-evaluates what you want using signals: * What you liked * How long you watch