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Dev.to
Dev.to
5/9/2026
The Floci philosophy: stay tiny, feel like real AWS

The Floci philosophy: stay tiny, feel like real AWS

Short summary

Floci is a lightweight AWS emulator that eliminates the tradeoff between testing speed and accuracy. Its architecture uses a tiny 24ms Quarkus core for control planes while leveraging real engines (Postgres, Redis, Kafka, DuckDB) for data planes. The philosophy: be fast where possible, real where it matters—tests should reveal bugs rather than provide false confidence.

  • 24ms startup time, 13 MiB idle memory footprint with real AWS service fidelity
  • Separates control planes (metadata/CRUD) from data planes (real execution engines)
  • Eliminates the test-production gap by refusing to lie about service behavior

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