  Clinical Quality Language (CQL) has emerged as a standard for rule
representation in Clinical Decision Support (CDS) and Electronic Clinical
Quality Measurement (eCQM) in healthcare. While open-source reference
implementations and a few commercial engines exist, there is still a market
need for high-performance engines that can execute CQL queries on the scales of
millions of patients. We introduce the \Hermes{} engine as the world's fastest
commercial CQL execution engine.
