August 30, 2012, 4:00 PM

Buy.com tops m-commerce site performance index

But at 2.7 seconds, Toolfetch.com has the swiftest mobile page load time.

Lead Photo

The merchant's m-commerce site home page loaded on average in 3.6 seconds.

Buy.com was the leader in mobile commerce site performance for the week ending August 26—it topped the Keynote Mobile Commerce Performance Index. Its m-commerce site home page loaded on average in 3.60 seconds and it did so completely and successfully 99.89% of the time. The weighted and combined figures for load time and success rate earned Buy.com an index score of 964 out of 1,000, reports mobile and web performance management firm Keynote Systems Inc.

Page load time is key in m-commerce, as mobile shoppers typically are on the go and crave speed. While Buy.com’s score earned it the top spot on the index, fifth place finisher Toolfetch.com LLC had the fastest page load time on the index at 2.70 seconds. A lower success rate of 99.47% dragged the tool retailer’s score down to 891.

Office Depot Inc. came in second with a load time of 3.03 seconds and a success rate of 99.67% for a score of 931. Amazon.com Inc. came in third place with a load time of 4.95 seconds and a success rate of 99.89% for a score of 910. And HSN Inc. came in fourth with a load time of 4.36 seconds and a success rate of 99.78% for a score of 906.

Buy.com is No. 19 in the Internet Retailer Mobile Commerce Top 300. Office Depot is No. 53, Amazon.com is No. 1, HSN is No. 58 and Toolfetch.com is No. 215.

Click here and then click on Keynote Mobile Commerce Performance Index Part 1 and Part 2 to see this week’s complete results for all 30 retailers on the index.

Keynote Systems measures 30 representative m-commerce sites exclusively for Internet Retailer. The sites include merchants in multiple categories and channels, and of multiple sizes, ranging from such giants as Amazon.com Inc. to midsized retailers like Toolfetch.com LLC. Keynote tests the sites in the index every hour Monday through Sunday from 8 a.m. through midnight Eastern time, emulating three different smartphones on three different wireless networks: Apple Inc.’s iPhone 4 on AT&T, the HTC Evo on Sprint and the Droid X on Verizon. The HTC Evo and the Droid X run Google Inc.’s Android operating system. Keynote runs the tests in New York and San Francisco.

Keynote combines a site’s load time and success rate, equally weighted, into a single score. Given that both performance and availability are important, the score reflects the overall quality of the home page; a higher score indicates better performance. Scores also reflect how close sites are to each other in overall quality. The index average score is the midpoint among all the sites’ scores.

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