WPO Stats

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

  • WPO Stats Icon

    COOK increased conversion rate by 7% after cutting average page load time by 0.85 seconds. Bounce rate also fell by 7% and pages per session increased by 10%. Permalink

    #conversion #engagement #bounce rate #2017
  • WPO Stats Icon

    Rebuilding Pinterest pages for performance resulted in a 40% decrease in wait time, a 15% increase in SEO traffic and a 15% increase in conversion rate to signup. Permalink

    #conversion #seo #2017
  • Financial Times Logo

    Tests of the new, faster FT.com showed users were up to 30% more engaged—meaning more vists and more content being consumed. Permalink

    #publishing #engagement #page views #2016
  • WPO Stats Icon

    BBC has seen that they lose an additional 10% of users for every additional second it takes for their site to load Permalink

    #abandonment #2017
  • WPO Stats Icon

    Ancestory.com saw a 7% increase in conversions after improving render time by 68%, page weight by 46% and load time by 64%. Permalink

    #conversion #2016
  • WPO Stats Icon

    AliExpress reduced load time by 36% and saw a 10.5% increase in orders and a 27% increase in conversion for new customers. Permalink

    #orders #conversion #2016
  • Google Logo

    53% of visits to mobile sites are abandoned after 3 seconds according to research from Google's DoubleClick. Permalink

    #abandonment #2016
  • Google Logo

    According to Google's DoubleClick, when comparing sites that load in 5 seconds to sites that load in 19 seconds, the faster sites had 70% longer average session lengths, 35% lower bounce rates and 25% higher ad viewability than their slower counterparts. Permalink

    #sessions #ads #viewability #bounce rate #2016
  • Google Logo

    Google's DoubleClick found that publishers whose mobile sites load in 5 seconds earn up to 2x more mobile ad revenue than sites loading in 19 seconds. Permalink

    #revenue #ads #2016
  • WPO Stats Icon

    For every 100ms decrease in homepage load speed, Mobify's customer base saw a 1.11% lift in session based conversion, amounting to an average annual revenue increase of $376,789. Similarly, for every 100ms decrease in checkout page load speed, Mobify's customers saw a 1.55% life in session based conversion, amounting to an average annual revenue increase of $526,147 Permalink

    #conversion #revenue #engagement #2016
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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.

@2017. A Tammy Everts and Tim Kadlec production.