Performance metrics for evaluating fire pumps include flow rate, pressure rating, efficiency, reliability, and response time. Flow rate refers to the volume of water delivered per unit of time, while pressure rating indicates the force at which water is discharged. Efficiency measures how effectively the pump converts energy into hydraulic power, and reliability reflects the pump's ability to operate consistently without failure. Response time is the duration it takes for the pump to activate and reach operational pressure upon detection of a fire.