Tech Optimizer
April 15, 2026
Supermetal introduced Iceberg sink support, allowing for data transfer from Postgres to Iceberg. In a performance comparison, Supermetal completed snapshotting in 13 minutes, while Flink took 90 to 116 minutes, Kafka Connect required 120 minutes, and Spark exceeded 3 hours. The tests focused on throughput during the snapshotting phase rather than latency. The setup used the TPC-H dataset with a scale factor of 50 and involved AWS infrastructure. Supermetal operates independently of Kafka, enabling direct data delivery from source to sink. It utilizes a JSON configuration file for deployment, supporting various catalogs and advanced configuration options. Supermetal's Iceberg writer can adjust settings based on the CDC source phase. Throughout the tests, Supermetal maintained low CPU and memory usage, while other tools faced challenges with performance and resource management. Data synchronization was validated across all tools, with Supermetal achieving at least 7x faster snapshotting performance without tuning.