WPO Stats

Case studies and experiments demonstrating the impact of web performance optimization (WPO) on user experience and business metrics.

  • WPO Stats Icon

    TRAC Research found, in a survey of 300 companies, that the average revenue loss for an hour of downtime was $21,000. For the same set of companies, average revenue loss due to an hour of slow performance (defined as load times exceeding 4.4 seconds) was $4,100. Website slowdowns occurred ten times more often than outages. Permalink

    #revenue #2011
  • Staples Logo

    Staples reduced median homepage load time by 1 second and reduced load time for the 98th percentile by 6 seconds. As a result, they saw a 10% increase in their conversion rate. Permalink

    #conversions #2014
  • GQ Logo

    GQ cut load time by 80% and saw an 80% increase in traffic. Median time spent on the site also increased by 32%. Permalink

    #traffic #engagement #2015
  • WPO Stats Icon

    AutoAnything reduced page load time by 50% and saw an 12-13% increase in sales. Permalink

    #conversions #revenue #2010
  • WPO Stats Icon

    Glasses Direct found that for every second they added to the load time, there was a 6.7% decrease in conversions. In addition, load time for users who did not convert was 3-4 times as high as for converting customers. Permalink

    #conversions #2012
  • WPO Stats Icon

    Etam reduces it's average page load time from 1.2s to 500ms and increased conversions by 20%, time on site by 21%, and pages viewed per visit by 28%. Permalink

    #conversions #engagement #page views #2015
  • YouTube Logo

    When YouTube introduced a version of their pages that was 90% lighter, they saw a large increase in traffic in areas with poor connectivity such as Southeast Asia, South America, Africa and Siberia. Permalink

    #reach #traffic #2012
  • WPO Stats Icon

    Edmunds decreased load time by 77% and saw a 20% increase in page views, 4% reduction in bounce rate and 3% reduction in ad impression variance. Permalink

    #ads #page views #bounce rate #2011
  • Walmart Logo

    Walmart saw up to a 2% increase in conversions for every 1 second of improvement in load time. Every 100ms improvment also resulted in up to a 1% increase in revenue. Permalink

    #conversions #revenue #2013
  • WPO Stats Logo

    The Obama for America site improved performance by 60% and saw a corresponding increase in conversions of 14%. Permalink

    #conversions #2012
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Hungry for more?

If you're looking for more resources around selling performance, we recommend the following resources:

  • Time is Money book cover

    Time is Money by Tammy Everts

    Tammy's book has study after study after study about why performance matters. She covers not just the business side of things, but also the psychology of performance: how does bad performance make users feel.
  • Designing for Performance book cover

    Designing for Performance by Lara Hogan

    Lara's book is loaded with great information about advocating for performance within your organization.
  • Path to Performance Logo

    Path to Performance Podcast hosted by Katie Kovalcin and Tim Kadlec

    The Path to Performance is dedicated to helping people figure out how to cultivate a culture of performance within their organizations.

Help make WPO Stats better by submitting your favorite performance case study.

@2015. A Tammy Everts and Tim Kadlec production.