September 18, 2013, 9:29 AM

Apple leads August consistency ratings

The retailer topped both Internet Explorer and Firefox consistency tests.

Jon Love

Associate Editor, Research

Lead Photo

Apple.com provided the most consistent performance for consumers using Internet Explorer among large retailers tested in August, says Compuware. The e-commerce site’s loading-time variation was only 0.36 seconds last month. Apple.com also had the best Firefox consistency score at 0.30 seconds. The lower the variation, the more consistently the site loads.

Costco.com (0.54 seconds) placed second in Internet Explorer tests. Dell.com (0.73) came in third, Overstock.com finished fourth (0.85) and Walmart.com (0.89) came in fifth.

In Firefox testing, Costco.com came in second place behind Apple with a deviation of 0.45 seconds. Amway.com trailed in third place (0.82), Walmart.com finished fourth (0.96) and LLBean.com was fifth (0.97).

The average Internet Explorer consistency score among the 22 retailers measured in July was 1.87 seconds. The same group of retailers produced an average Firefox score of 2.03 seconds.

The consistency ratings take into account differences in the speed of web page delivery across multiple visits.

Click here for the full test results.

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