Amazon is growing on-demand services after reporting a 20% sales increase in 2015.
Sears.com and LLBean.com led large retailers last month, Gomez says.
Sears.com had the best consistency score among large retailers tested on Internet Explorer in November, says Gomez, the web performance division of Compuware Corp. Last month, the retailer had the best site loading time with a variation of 0.80 seconds. In Internet Explorer testing, Sears.com was followed by LLBean.com (1.12 seconds), Apple.com (1.15), OfficeDepot.com (1.17), and Netflix.com and Williams-Sonoma.com (tied at 1.18 seconds).
LLBean.com had the best Firefox consistency score in November, Gomez reports, with an average variation of 0.80 seconds. CDW.com was second (1.09 seconds) followed by BestBuy.com (1.16), OfficeMax.com (1.27) and QVC.com (1.28).
The average Internet Explorer consistency score among the retailers measured in November was 1.76 seconds. The same group of retailers produced an average Firefox consistency score of 2.19 seconds.
The consistency ratings take into account differences in the speed of web page delivery across multiple visits.