PBench 1.2.1: End-to-End Benchmarking and Performance Testing for Presto

Benchmarking a distributed SQL engine like Presto involves much more than running a few queries and recording wall-clock times. Real-world performance evaluation demands multi-phase test execution, concurrent workloads, production traffic replay, and deep offline analysis. PBench is a purpose-built benchmarking toolkit for Presto that handles all of this through a declarative, composable stage system.