This story was originally published on HackerNoon at: https://hackernoon.com/json-was-killing-our-redis-memory-switching-serialization-made-it-7-smaller.
Cut Redis memory usage by 7× by ditching JSON for Pydantic models. Learn how a custom binary format reduced storage, costs, and overhead at scale.
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Redis was running a large production service with about **10 million monthly active users**. Every record in Redis was a **JSON-serialized Pydantic model** It looked clean and convenient – until it started to hurt. At scale, JSON stops being a harmless convenience and becomes a silent tax on memory.

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