Cleaning equipment maker iRobot reported revenue growth of 30.6% year over year in Q2’21, supported by a 152.7% surge in U.S. seaborne imports linked to the firm. That growth has come at the expense of “increasing costs for ocean transportation, sourcing materials on the open market, increased raw material costs, as well as increased air freight” according to CFO Julie Zeller. The “supply chain constraints and cost headwinds are temporary” according to CEO Colin Angle. Nonetheless, the company appears to have had to deal with the closure of Yantian port in China, whi...