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This guest post is written by Josh Fraser, co-founder and CEO of Torbit. Torbit creates tools for measuring, analyzing and optimizing web performance.
Did you know that 5% of the pageviews on Walmart.com take over 20 seconds to load? Walmart discovered this recently after adding real user measurement (RUM) to analyze their web performance for every single visitor to their site. Walmart used JavaScript to measure their median load time as well as key metrics like their 95th percentile. While 20 seconds is a long time to wait for a website to load, the Walmart story is actually not that uncommon. Remember, this is the worst 5% of their pageviews, not the typical experience.