Databend recently improved its data processing capabilities by implementing a new aggregation hash table inspired by DuckDB. This update enhances group aggregation performance significantly in both standalone and distributed environments. Benchmarks using ClickBench/hits demonstrate enhancements ranging from 7% to 56% across various configurations, including local machines and cloud setups. This optimized hash table also supports spill functionality, accommodating larger datasets effectively. These enhancements ensure more efficient data processing, particularly in distributed scenarios.