January 2026: Delivered performance-focused enhancements in spiceai/datafusion, strengthening the optimizer and encoding paths. Key work includes Optimizer Projection Statistics Enhancement (Constant Columns) to enable sort-elimination by exposing non-null literal statistics, and Spark Hex Encoding Optimization to replace format strings with lookup tables for hex/sha1 encoding. Both items include tests and did not alter user-facing behavior. The work improves query planning efficiency, reduces unnecessary sorts, and lowers encoding overhead, delivering measurable business value for analytics workloads.

December 2025 monthly performance summary for tarantool/datafusion: Delivered key features and stability fixes, improving data processing reliability, Spark compatibility, and test maintainability. Focused on correctness of Spark UDF nullability, TTL preservation for ListFilesCache to ensure predictable performance, and reducing test boilerplate with a new ParquetOpenerBuilder.