The Retailer Web Performance Report Card: Macy's, Vistaprint and CDW

This month's Retailer Web Performance Report Card, a monthly ROI Report column by SmartBear Software, features retailers trying to capture as much holiday revenue as possible before Christmas. Through SmartBear's AlertSite, we see how online retailers’ websites perform from the end user perspective. We've picked three retailers to spotlight in December, measuring them against the critical benchmark trends in web performance — stability (standard deviation), availability and response times — to see how they're performing in the homestretch of the holiday shopping season.