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Rust Intern Saved TikTok $300K by Rewriting a Go Service: Revision history

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14 November 2025

  • curprev 15:5315:53, 14 November 2025 PC talk contribs 8,981 bytes +8,981 Created page with "Every few months, the tech world rediscovers a truth that’s as old as the mainframe: computers are fast, but cloud bills are faster. Case in point — TikTok reportedly saved $300,000 a year after an intern rewrote part of a Go microservice in Rust. Not a full rewrite. Not a heroic all-nighter by a crack performance team. Just an intern and a partial refactor. The results read like a benchmarking fairy tale: * CPU usage dropped from 78% to 52%, * Memory usage f..."
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