WPO Stats

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

  • WPO Stats Icon

    redBus, a bus booking and ticketing website based in India, undertook a substantial effort to improve their website's INP by 72%. As a result of their efforts, they were able to increase sales by 7%. Permalink Share on Twitter

    #posts #INP #sales #2023
  • WPO Stats Icon

    The Economic Times improved CLS from 0.25 to 0.9 and reduced values in the "Poor" range by 65%, and also improved LCP from 4.5 seconds to 2.5 seconds and reduced values in the "Poor" range by 33%. This reduced bounce rates by 43%. Permalink Share on Twitter

    #posts #bounce rate #conversions #LCP #CLS #core web vitals #2021
  • WPO Stats Icon

    QuintoAndar reduced LCP by 26% and FID by 72% and saw a 46% reduction in bounce rate, and 87% increase in pages per session, and a 5% improvement in conversion. Permalink Share on Twitter

    #posts #bounce rate #conversions #conversion rate #engagement #LCP #FID #core web vitals #2021
  • WPO Stats Icon

    Adobe improved from 7.2 seconds to 3.4 seconds and engaged visit rate increased by 35%, bounce rates decreased by 6%, and the average time spent on page increased by 21% for mobile visitors. Permalink Share on Twitter

    #posts #bounce rate #engagement #2023 #core web vitals #session duration
  • WPO Stats Icon

    Carpe improved Largest Contentful Paint by 52% and Cumulative Layout Shift by 41% and saw a 10% increase in traffic, a 5% increase in online store conversion rate, and a 15% increase in revenue. Permalink Share on Twitter

    #posts #bounce rate #conversion rate #traffic #revenue #2023 #core web vitals
  • WPO Stats Icon

    Sunday Citizen improved their key performance metrics and were able to achieve 25% improvement in Largest Contentful Paint and 61% in Cumulative Layout Shift at the 75th percentile. This resulted in 4% decrease in bounce rate and over 6% increase in conversion. Permalink Share on Twitter

    #posts #bounce rate #conversion rate #2022 #core web vitals
  • WPO Stats Icon

    Rakuten 24 ran an A/B test showing improved vitals brought a 53.4% incrase in revenue per visitor, 33.1% increase in conversion rate, 15.2% increase in average order value, 35.1% reduction in exit rate and more! Permalink Share on Twitter

    #posts #bounce rate #revenue #traffic #abandonment #session duration #conversion rate #2022 #core web vitals
  • WPO Stats Icon

    Groupe Renault found a strong correlation between Largest Contentful Paint and both their bounce rate and conversion rate, with a 1 second improvement leading to up to a 14 percentage point decrease in bounce rate, and 13% increase in conversions. Permalink Share on Twitter

    #posts #bounce rate #conversion rate #2021 #core web vitals
  • WPO Stats Icon

    SpeedSense worked with an e-commerce company to improve performance and saw a 7.6% increase in sitewide conversion, translating to roughly a $6 million lift in annual revenue. Mobile transactions increased by nearly 30% and sales per session increased by 16%. Permalink Share on Twitter

    #posts #conversion rate #revenue #2021 #conversion #engagement
  • WPO Stats Icon

    Ingram Micro focused on reducing Total Blocking Time and saw a 35% increase in organic traffic by improving their homepage TBT by 40%. Permalink Share on Twitter

    #posts #core web vitals #page views #2021 #conversion #engagement #search #seo #sessions #traffic
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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.

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

@2024. A Tammy Everts and Tim Kadlec production.

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