WPO Stats

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

  • 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 Share on Twitter

    #posts #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 Share on Twitter

    #posts #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 Share on Twitter

    #posts #conversion #revenue #engagement #2016
  • WPO Stats Icon

    Optimizely added artificial latency to the Telegraph and saw page views plummet: by 11% for a 4 second delay and 44% for a 20 second delay. Permalink Share on Twitter

    #posts #page views #2016
  • WPO Stats Icon

    The Trainline reduced latency by 0.3 seconds across their funnel and customers spent an extra £8 million (~$11.5 million) a year. Permalink Share on Twitter

    #posts #revenue #2016
  • Financial Times Logo

    Financial Times added a one second delay to every page view and saw a 4.9% drop in the number of articles users read over a 7 day window. A two-second delay resulted in a 4.4% drop, and a three second delay saw a 7.2% drop. After twenty-eight days the two and three second variants both resulted in further drops in engagement. Permalink Share on Twitter

    #posts #revenue #publishing #engagement #page views #2016
  • Instagram Logo

    Instagram increased impressions and user profile scroll interactions by decreasing the response size of the JSON needed for displaying comments (by 33% for the median and 50% for the 95th percentile for the main endpoint). Permalink Share on Twitter

    #posts #engagement #impressions #2016
  • 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 Share on Twitter

    #posts #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 Share on Twitter

    #posts #conversion #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 Share on Twitter

    #posts #traffic #engagement #2015
« Prev 1 2 3 4 5 6 7 Next »

Filter by tag:

  • #2006
  • #2008
  • #2009
  • #2010
  • #2011
  • #2012
  • #2013
  • #2014
  • #2015
  • #2016
  • #2017
  • #2018
  • #2019
  • #2020
  • #2021
  • #2022
  • #2023
  • #CLS
  • #FID
  • #INP
  • #LCP
  • #abandonment
  • #ads
  • #bounce rate
  • #conversion
  • #conversion rate
  • #conversions
  • #core web vitals
  • #engagement
  • #expense
  • #impressions
  • #orders
  • #page views
  • #posts
  • #publishing
  • #reach
  • #revenue
  • #sales
  • #satisfaction
  • #search
  • #seo
  • #server
  • #session duration
  • #sessions
  • #traffic
  • #user timing
  • #viewability

Subscribe

Follow along using the magic of RSS.

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.

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

@2024. A Tammy Everts and Tim Kadlec production.