UK sites improve in terms of mobile performance in September

The UK sites Next, Tesco, Marks & Spencer and John Lewis have improved overall in terms of their mobile performance; however some sites continued to struggle with availability, according to a study by Keynote Systems. Tesco's mobile site came in last place of all the sites monitored, with a poor average success rate of only 93.55 percent for the month. The German retailers outperformed all of the other sites monitored in the response time category with OTTO, Aldi and Amazon (DE) securing three of the top four spots. OTTO was the quickest site to load with an average response time of 4.49 seconds. However, all three of the German sites were in the bottom half of the index for availability. The top three sites for availability Amazon (JP), H&M (SE) and IKEA (SE), all managed to score a 100 percent success rate for September; however they did not perform so well in the speed category. Very few sites had consistently good performances across both indices, with only Next (UK), Chanel (FR), Marks & Spencer (UK), Walmart (US), Amazon (JP) and John Lewis (UK) appearing in the top half for both response times and availability. Carrefour was the poorest performing mobile site overall for September with an average availability of 99.29 percent and a very slow response time of 56.06 seconds. The mobile sites of these retailers were measured using a webkit based smart phone browser every hour from London, Nurnberg, Paris, San Francisco, New York, Stockholm, Sydney and Tokyo.