DataFusion Comet hits 1.0: Spark acceleration now a compatibility promise
Comet, the plan-translating Spark accelerator built on DataFusion, reached 1.0 with semantic versioning, full Spark 4.x/ANSI mode support, and all four join operators going native. It validates correctness by running Spark's own 24,000+ test suite with Comet enabled, plus fuzzing and AI code audits.