The marketplace gives consumers access to more than 300 products created using a 3-D printer.
The retailers topped Internet Explorer and Firefox consistency tests by Compuware Gomez.
OfficeMax.com had the best consistency score for Internet Explorer testing among large retailers tested in September, says Compuware Gomez. Last month, the retailer had the most consistent Internet Explorer site loading time with a variation of 0.71 seconds. LLBean.com had the best Firefox consistency score at 0.57 seconds.
LLBean.com (0.77 seconds) placed second in Internet Explorer tests. Dell.com (0.79) came in third, followed by Overstock.com (0.84) and Walmart.com (0.93).
In Firefox testing, LLBean.com followed Amway.com in second place with a variation in site loading time of 0.72 seconds. Overstock.com was next (0.78), followed by Apple.com (0.94 seconds) and OfficeMax.com (1.00 second).
The average Internet Explorer consistency score among the 20 retailers measured in September was 1.47 seconds. The same group of retailers produced an average Firefox score of 1.89 seconds.
The consistency ratings take into account differences in the speed of web page delivery across multiple visits.
Click here to view the full test results.