What does a CPU do? The worker reading every instruction

Lesson 3 of what a computer does: the chip doing the actual work while you vibe code. What a CPU is, the tiny loop it runs billions of times a…

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Sam Ortega · Build Editor

You now understand

A CPU executes a program's instructions one at a time, extremely fast

You now understand

It runs a fetch-decode-execute loop billions of times a second

You now understand

Heavy work per request is where an app's slowness and cost come from

What this means for your app

When a page is slow or your hosting bill climbs, it's usually the CPU doing too much on every visit. Ask your AI tool to do expensive work once and reuse the result (caching), rather than…

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What does a CPU do? The worker reading every instruction

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