Magnetic sensors track muscle length – MIT Media Lab

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Low-latency tracking of multiple permanent magnets – MIT Media Lab

Bhavesh Vaswani on Instagram: "It’s not about one fast query - it’s about smart system design 👇 ⸻ 1️⃣ Pre-computed Feeds (Fan-out on Write) 👉 Instagram builds your feed before you open the app. Example: When someone you follow posts, it’s pushed into followers’ feed storage in advance. ⸻ 2️⃣ Heavy Caching Everywhere 👉 Feeds, user profiles, and post metadata are cached in memory. Example: Opening the app mostly hits cache, not the database. ⸻ 3️⃣ Read-Optimized Data Models 👉 Feed data is stor