Tinybird runs a private fork of ClickHouse to stay in control of their performance, roadmap, and infrastructure. While they still contribute to upstream, key features like zero-copy replication (essential for S3/GCS efficiency) were being removed or closed-sourced. Their fork enables faster releases, custom features (like packed part format, materialized view UNION support, in-place filtering), and immediate bug fixes. Itโs a major investmentโbut crucial for performance, cost savings, and serving large-scale analytics needs.
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