Performance studies
Learn how faster site speed impacts your business.
Core Web Vitals is a Measurable Ranking Factor by SISTRIX
Domains passing all Core Web Vitals gained 1% Google visibility, while those failing at least one metric lost 2.7%.
Core Web Vitals Study by Advanced Web Ranking
Across three million pages, results ranking in positions 1-5 had a roughly one second faster LCP on average.
Core Web Vitals Case Study by Link-Assistant
A site whose LCP slipped from green to amber lost 30% of its organic clicks until the load time was optimized again.
The Business Impact of Core Web Vitals - Nykaa
Nykaa improved LCP by 40% and grew organic search traffic by 28%, most visibly on mobile.
Shopify Case Study: Carpe
Carpe made LCP 52% faster and lowered CLS by 41%, resulting in 10% more organic traffic.
web.dev Case Study: Farfetch
Farfetch measured a 1.3% drop in conversion rate for each additional 100 ms of LCP beyond the optimal threshold.
Speed Kit Case Study: Tamaris
Tamaris makes 2% more revenue and 3% more conversions with a 1.7x faster website.
Speed Kit Case Study: Canyon
Canyon saw 1.66% more orders on supported devices, with 69% of navigations reaching an instant LCP.
Speed Kit Case Study: Zwilling
Zwilling makes 5% more revenue and 2% more conversions with a 1.5x faster website.
Speed Kit Case Study: Hugendubel
Hugendubel gained 4.37% more revenue, with 45% faster category pages and 80% of navigations preloaded.
Speed Kit Case Study: MeinAuto
MeinAuto.de increased its conversion rate by 3.66% after making load times 34% faster.
Speed Kit Case Study: Seidensticker
Seidensticker lifted conversions by 2.86% and revenue by 2.66% after cutting 359 ms off category-page LCP.
Speed Kit Case Study: Hawesko
Hawesko generated 3.26% more revenue and 1.73% more conversions after cutting 377 ms off category-page LCP.
Speed Kit Case Study: Parfumdreams
Parfumdreams increased conversions by 3.22%, with product pages 39% faster and 82% of navigations preloaded.
Speed Kit Case Study: AWG Mode
AWG lifted its conversion rate by 4.23% and revenue by 7.09%, with 70% of traffic loading within one second.
Speed Kit Case Study: Dictum
DICTUM lifted conversions by 6.96% after making LCP 66% faster.
Speed Kit Case Study: Erwin Müller
Erwin Müller lifted conversions by 1.74% and projected revenue by 2.29%, with 81% of traffic loading within one second.
Speed Kit Case Study: Morplan
Morplan lifted conversions by 5.72% and saw a 14x return on investment, with product-page LCP roughly 800 ms faster.
Speed Kit Case Study: Niche Beauty
NICHE-BEAUTY increased conversions by 7.76% after making category pages 68% faster.
Speed Kit Case Study: Purelei
Purelei lifted conversions by 2.3% and projected revenue by 3.33% after a 55% LCP improvement.
Speed Kit Case Study: RidersDeal
RidersDeal lifted its conversion rate by 2.33% after cutting 547 ms off product-page LCP.
Speed Kit Case Study: Zizzi
Zizzi increased conversions by 3.66%, with 47% faster load times and 82% of navigations preloaded.
Speed Kit Case Study: VAN GRAAF
VAN GRAAF improved conversions by 7.53%, with category pages 69% faster and product pages 57% faster.
Powerful Apps Fueled by the Web
Learn how developers are engaging an expanding Chrome OS audience through progressive web apps.
Need for Speed: The Impact of In-Process Delays on Customer Behavior in Online Retail
Learn how delays impact online sales across the different stages of a customer's shopping journey.
User Testing: How Refurbed Got 11.5% More Mobile Conversion
If the user experience of a mobile website is not smooth, mobile users do not hesitate long and leave the site.
Timeline for Bringing Page Experience Ranking to Desktop
Google is using page experience as part of their desktop ranking systems beginning in February 2022.
How the Economic Times Passed Core Web Vitals Thresholds
Optimizing Core Web Vitals on The Economic Times website led to an overall 43% better bounce rate.
The Business Impact of Core Web Vitals - Tokopedia
Tokopedia improved LCP by 55% and saw 23% better average session duration.
Orange: New PWA Converts 52% Better on Mobile
The new PWA has an average loading time 30% faster than the old site and has improved bounce rate by 12%.
web.dev Case Study: Telegraph Media Group
The leading UK news website managed to improve their 75th percentile CLS by 250% from 0.25 to 0.1.
Swappie Increased Mobile Revenue by Focusing on Core Web Vitals
Swappie lowered the average page load time by 23% and increased mobile revenue by 42%.
Speed Kit Case Study: BMW
Speed Kit has been rolled out for 118 countries and achieved a 1.5x faster LCP overall.
Ericsson Mobility Report
Service providers are aware that a good user experience is key for driving customer satisfaction and financial return.
Boosting User Conversion With UX Performance Wins
Reducing the FCP (75th percentile) of Yelp by 45% improved the conversion rate by 15%.
Web Vitals Impacts Your Online Business - Part 1 LCP
Part 1 of 3 focuses on LCP and how this Google Core Web Vital metric correlates to business KPIs.
CLS optimizations increased Yahoo! JAPAN News's page views
Optimizing CLS by 0.2 led to a 15% increase in page views per session and 13% longer session durations.
web.dev Case Study: Mainline Menswear
Mainline Menswear implements PWA and sees a 55% conversion rate uplift.
Core Web Vitals at Mail.ru Home Page
Improving Core Web Vitals on the Mail.ru home page resulted in an average 10% increase in conversion rates.
The Business Impact of Core Web Vitals - iCook
iCook improved the CLS by 15% and achieved 10% more ad revenue.
web.dev Case Study: Renault
How Renault improved its bounce and conversion rates by measuring and optimizing Largest Contentful Paint.
web.dev Case Study: Netzwelt
How committing to Core Web Vitals increased Netzwelt's advertising revenues by 18%.
PWA Experiments by Lyft
Eric Bidelman from Lyft found that PWA users on older devices take 11% more rides than native users.
web.dev Case Study: Blibli
Blibli's PWA generates 10x more revenue per user than their previous mobile website.
Vodafone Increased Sales by 8%
An A/B test focused on optimizing Web Vitals showed that a 31% improvement in LCP led to 8% more sales.
The Science Behind Web Vitals
When a site meets the thresholds for the Core Web Vitals, users are 24% less likely to abandon page loads.
Thomas Kent: Rapid Growth of Magento-based Shop
Thomas Kent launched a Magento-based PWA with 77% higher conversion rate and 54% faster page load time.
The Impact Of Speed On Ecommerce
SportsShoes.com found that faster-than-average mobile visits converted 41% stronger than slower-than-average visits
SnipesUSA Invests in Site Speed Now and for the Future
Sneaker retailer SnipesUSA.com speeds up page-loading time by 30% and doubles its conversion rate.
Fasterize Helps Rossignol Divide Its Web Page Load Time by 10
Rossignol.com reduced their load time to 1.9 seconds, which improved the conversion rate by 94%.
web.dev Case Study: Rakuten
Rakuten 24’s investment in PWA increases user retention by 450%.
NDTV Achieved a 55% Faster LCP by Optimizing Core Web Vitals
NDTV improved the LCP by 55% in just a month and lowered their bounce rate by 50%.
The Impact of Web Performance
Mobile users who experienced fast rendering bring 327% more revenue than those who experienced slow rendering.
Revelry’s Bounce Rate Plummets With Faster Site
Making the Revelry website 43% faster decreased bounce rates by 8% and increased conversions by 30%.
web.dev Case Study: JD.ID
JD.ID improves their mobile conversion rate by 53% with caching strategies, installation, and push notifications.
web.dev Case Study: Goibibo
How Goibibo's PWA bridges the gap between web and iOS/Android experiences and improved conversions by 60%.
web.dev Case Study: Tokopedia
How focusing on web performance improved Tokopedia's click-through rate by 35%.
Shopping for Speed on ebay.com
For every 100 ms improvement in search page loading time, eBay saw a 0.5% increase in "Add to Cart" count.
web.dev Case Study: Clipchamp
Clipchamp's video editor PWA installs see a 97% monthly growth.
Butcher of Blue: Delivering Flexibility and Unique UX Features
Butcher of Blue launched a Magento-based PWA with 85% faster page load time and 29% higher organic search traffic.
Speed Kit Case Study: Carhartt WIP
Carhartt WIP implemented Speed Kit in only one week and achieved a 1.9x faster FCP.
How Agrofy Optimised Core Web Vitals & Improved Business Metrics
Agrofy achieved a 76% reduction in the abandonment rate and significant boost on engagement.
Milliseconds Make Millions
A study on how improvements in mobile site speed positively affect a brands bottom line.
ZEE5 Launches a New PWA in an Effort Increase Its Reach
ZEE5 launched a PWA with a 3x faster loading time while reducing the buffering time to half.
Otto Group's Mobile Speed Race Improves Mobile Loading Times
The Otto Group achieved a lower bounce rate and longer sessions through better loading times.
The Value of Speed
Show stakeholders how site speed improvements can increase revenue.
How Opensooq Increased Engagement by Investing in the Web
OpenSooq's PWA increased the monthly active users of OpenSooq's web experience by 14%.
How Truebil Made the Web Its Channel of Growth
Moving to a PWA focused on speed, resilience, and engagement, enabled Truebil to increase conversions by 61%.
Kubota Case Study: Launching PWA in a Mobile-First Store
Kubota launched a Magento-based PWA with 192% growth of daily visitors and 30% improved loading times.
COOK Increases Conversions By Seven Percent
Eggplant helped COOK improve load times by almost a second and increase conversion rate by 7%.
Treebo’s PWA - The Journey and the Impact So Far
Treebo launched a PWA and lowered the average page load time for the first page on mobile to 1.5 seconds.
Starbucks Improved Engagement With a PWA
The Starbucks PWA increased the daily active users by 2x and opened some features to a much broader audience.
Google Web Case Study: Nikkei
The Nikkei PWA achieved a 2x better speed index, 2.3x more organic traffic and 58% higher conversions.
Delivering The Best Mobile User Experience on the Web
The Best Western River North Hotel sees 300% increase in revenue and 500% increase in room nights with new PWA.
How Did Slow Fashion Win an Ultra-Fast Web Performance?
Rooted Objects launched a Magento-based PWA with 162% higher conversion rate and 25% faster page load.
How Missguided Revolutionised Their Approach to Site Performance
Missguided improved median page load time by 4 seconds and achieved a 26% revenue increase.
How We Got Into the Top 3 of the Fastest E-Commerce Websites
Idealo reduced the load time of their homepage by 4 seconds and became one of the fastest e-commerce websites.
Driver Solutions Case Study: Web Performance Optimization
How Driver Solutions speed up their site to improve user experience, conversion rates, and ultimately search rankings.
ImageEngine Case Study: Furnspace
Deploying CDN-based image optimization led to a 100% increase in conversions and a 20% decrease in bounces.
Debenhams’ PWA Boosts Speed, Conversions and Revenue
Debenhams launched a PWA with 40% higher mobile revenue and 20% higher conversions.
Performance Optimization with Dareboost (by M6 Web)
Dareboost optimized performance for a leading french coupon website and increased the conversion rate by 12%.
Think Fast: The Page Speed Report
Consumers are not as patient as they think and most marketers do not make page speed a priority.
Modern Websites for E-commerce in the Real World
Carousell accelerated their page load time by 65% and increased organic traffic by 63%.
How the BBC Builds Websites That Scale
At the BBC they noticed that, for every additional second a page takes to load, 10% of users leave.
Google Web Case Study: George.com
After upgrading their website to a PWA, George.com saw a 31% increase in mobile conversion.
BMW’s Journey to a Fast, Smooth, and Reliable Mobile Website
Accelerating page loads by 3-4x with AMP led to a 50% growth in mobile users.
BMW Success Story With AMP
Accelerating page loads by 3-4x with AMP led to a 30% higher clickthrough to national websites.
Zalando: Loading Time Matters
100 ms loading time improvement led to a 0.7% uplift in revenue per session.
Building a Faster Mobile Site With Pagespeed Insights & Test My Site
Zitmaxx Wonen lowered their load time to 3 seconds and increased mobile revenue by 98.7%.
Chrome Dev Summit 2017: West Elm Case Study
West Elm saw a 15% increase in average time spent and 9% lift in revenue per visit with their new PWA.
Google Web Case Study: Twitter Lite
Twitter Lite PWA significantly increased engagement, reduced data usage and decreased bounce rate by 20%.
Trivago Embrace Progressive Web Apps as the Future of Mobile
Trivago found that 67% of users interrupted by a period offline continued browsing the site after coming back online.
Google Web Case Study: Wego
Travel company Wego has built a successful AMP-based PWA and increased organic visits by 12%.
Google Web Case Study: Voot
The Voot.com PWA increased session time per user by 39% and daily views per user by 15%.
Building m.uber: Engineering a High-Performance Web App
The Uber PWA is 50 kB gzipped and minified, which means a 3 second time to interaction on typical 2G networks.
How We Built Twitter Lite
The Twitter Lite PWA reduced average load times by 30% and 99th percentile time-to-interactive latency by 25%.
A Tinder Progressive Web App Performance Case Study
The Tinder PWA reduced load times from 11.91 seconds to 4.69 seconds compared to the previous website.
The Raphael Hotel Earns 20% Increase In Website Conversion
The Raphael Hotel PWA increased organic search traffic by 77%, sessions by 59% and pageviews by 66%.
A Pinterest Progressive Web App Performance Case Study
The Pinterest PWA increased time spent by 40%, user-generated ad revenue by 44% and core engagements by 60%.
Google Web Case Study: OLA
The OLA PWA drives mobility for a billion Indians and achieved a 68% increase in mobile traffic in tier 2 and 3 cities.
Forbes Boosted Impressions per Session by 10%
The new Forbes PWA cut down the average amount of time it takes to render content from 6.5 seconds to 2.5 seconds.
Forbes Rebuilt Its New Mobile Website as a Progressive Web App
The Forbes PWA loads in 0.8 seconds compared to anywhere from 3 to 12 seconds on its current mobile site.
New Findings: The State of Online Retail Performance
The intersection of performance metrics from three different perspectives: IT, business, and user experience.
Building a PWA in Argentina
The Garbarino PWA increased conversions by 27%, returning visitors by 13% and decreased bounce rate by 9%.
Google Web Case Study: Forbes
The Forbes PWA increased sessions per user by 43% and ad viewability by 20%.
5miles Zeros in on Its PWA to Increase Mobile Conversion
Shoppers spend 20% more time on the 5miles PWA mobile site than they did on the previous mobile site.
Chrome Dev Summit 2017: Petlove Case Study
Petlove saw 2.8x higher conversions and 2.7x longer time spent on site with their new PWA.
Google Web Case Study: OLX
OLX boosts re-engagement on the mobile web by 250% and lowers bounce rate by 80% with a progressive web app.
Google Web Case Study: Mynet
Mynet speeds up their mobile web experience by 4x, increasing revenue by 25% with AMP-based PWA.
Google Web Case Study: Lancôme
Lancôme rebuilds their mobile website as a PWA and increases conversions by 17%.
Google Web Case Study: MakeMyTrip
MakeMyTrip.com’s new PWA delivers 3x improvement in conversion rates and 38% improvement in page load times.
Why Are App Install Banners Still A Thing?
Internal metrics at Google show that PWA install banners convert 5-6x more often than native install banners.
Google Web Case Study: Infobae
Infobae more than doubles time spent on mobile and lowers bounce rate down to 5% with a progressive web app.
Milestone Boosts Website Conversions by 53% With PWA
Grand Velas Riviera Maya resort increased conversions by 53% leveraging the speed and notification benefits of PWA.
The Total Economic Impact of Accelerated Mobile Pages
Forrester created a model to project the expected return from implementing AMP over a three year period.
Google Web Case Study: Ele.me
Ele.me improves average loading time across all pages by 6.35% with a multi-page PWA.
NCC Group Case Study: COOK
COOK improved the average page load time from 4.8 to 3.95 seconds and lowered the bounce rate by 7%.
Why Mobile Web Is Important and How PWA Helps You to Tame It
Commonfloor Groups launched a PWA and saw a 2x increase in daily active users.
Buecher.de Optimizes Performance of Adwords Landing Pages
buecher.de achieved a 4% conversion rate uplift by improving page load times by 35%.
Google Web Case Study: BookMyShow
BookMyShow’s new PWA drives an 80% increase in conversions and takes less than 2.94 seconds to load.
Demystifying Speed Tooling (Google I/O ’19)
As page load time goes from 1 second to 3 seconds the probability of bounce increases 32%.
Akamai Online Retail Performance Report
Akamai shows that even 100 ms faster or slower performance impact customer engagement and online revenue.
Google Web Case Study: Jumia (2017)
African e-commerce website Jumia sees 33% increase in conversion rate and 12x more users on PWA.
Google Web Case Study: The Weather Channel
The Weather Channel PWA sees mobile web success with a 80% improvement in load time.
From Application Metrics to Customer Experience Metrics
The Trainline reduced their latency by 300 ms which increased revenue by an extra £8 million per year.
How Does Page Load Time Impact Engagement?
The Telegraph increased page load times to find out that this lead to reduced user engagement.
Google Web Case Study: Suumo
The PWA of Japan's top real estate site achieved a 75% load time decrease and 31% open rate from push notifications.
Google Web Case Study: Konga
The Konga PWA uses 92% less data for initial load compared to the Konga native app.
Google Web Case Study: eXtra Electronics
The eXtra Electronics PWA grows e-commerce sales by 100% with web push notifications.
Google Web Case Study: Jumia (2016)
Push notifications help Jumia reverse cart abandonment and increase conversions by 9x.
How Mobile Latency Impacts Publisher Revenue
Publisher mobile sites that load in 5 seconds earn up to 2x more mobile ad revenue than those that load in 19 seconds.
How Does Page Load Time Impact Engagement?
Optimizely found that slowing down The Telegraph by 4 seconds resulted in a 11.02% decrease of pageviews.
Performance & Usage at Instagram
Instagram saw an increase in user engagement after technical optimizations.
Financial Times Hopes Speedy New Website Will Boost Subscribers
In tests of the new FT.com, users were up to 30% more “engaged” than they were with the previous version of the site.
Google Web Case Study: Housing.com
Housing.com increases conversions and lowers bounce rate by 40% with new progressive web app.
Flipkart Triples Time-On-Site With Progressive Web App
Flipkart combined their web presence and native app into a PWA that has resulted in a 70% increase in conversions.
Mobify Report Reveals Impact of Mobile Website Speed
For every 100 ms decrease in page load speed, Mobify's customer base saw a 1.11% lift in session based conversion.
A Faster FT.com
Even a small deceleration of the page load leads to a significant degradiation of user engagement and revenue.
Google Web Case Study: Carnival Cruise Line
Carnival Cruise Line provides personalized, engaging communication service for its customers with push notifications.
Google Web Case Study: Babe
BaBe’s cross-browser PWA rivals the performance of their native app with the same time spent on site.
Google Web Case Study: AliExpress
AliExpress increases conversion rate for new users by 104% with new Progressive Web App.
Google Web Case Study: The Washington Post
AMP helps the Washington Post increase returning users from mobile search by 23%.
Akamai Event: AliExpress
AliExpress accelerated their page load time by 36% and increased conversions for new customers by 27%.
Google Web Case Study: Alibaba
Alibaba.com increases conversions on the mobile web by 76% with progressive web app.
Google Web Case Study: 5miles
5miles decreases bounce rate by 50% and increases conversions by 60% with new Progressive Web App.
How The Washington Post Cut Its Page Load Time by 85%
The Washington Post has reduced the time it takes a page to appear complete to readers to 1.7 seconds.
Etam Earns 20% Of Conversion by Optimising Its Online Store
Reducing the page load time of Etam’s online store by 700 ms resulted in 20% higher conversions.
How GQ Cut Its Webpage Load Time by 80 Percent
GQ load time optimizations led to longer sessions and overall more traffic.
Google Web Case Study: Beyond the Rack
Beyond the Rack re-engages users on the mobile web, increasing revenue per visit by 26% with push notifications.
Driving User Growth With Performance Improvements
A 40% load acceleration on Pinterest increased SEO traffic by 15%.
Velocity NY - How to Measure Revenue in Milliseconds
Staples achieved a 10% increase in conversions by reducing their median homepage load time by 1 second.
Web Performance Is User Experience
Page load time has a significant impact on mobile user experience.
Web Performance Is User Experience
Etsy found an increased bounce rate of 12% on mobile devices when they added 160KB of images to a page.
Intuit Presents Performance Findings at Velocity 2013
Intuit observed a conversion increase of 3% for every page load second reduced from 15 seconds to 7 seconds.
How Walmart Increased Revenue and Conversions
Cliff Crocker describes how accelerating page loads by 100 ms increased Walmart's revenue by 1%.
YouTube: Page Weight Matters
YouTube's 90% lighter version of their website gained large amounts of traffic in areas with poor internet connectivity.
TagMan Case Study: Glasses Direct
Page load time for visitors who abandoned the site without converting was 3-4x higher than for those who converted.
Edmunds Decreased Page Load Time by 80% in 3 Simple Steps
Edmunds reduced the page load time by 80% and lowered their bounce rate by 4%.
Online Performance is Business Performance by Trac Research
An hour of slow performance (page load time exceeds 4.4 seconds) caused an average revenue loss of $4,100.
AOL Notices Higher Engagement With Faster Users
AOL found that its 10% fastest users viewed around 50% more pages than visitors in the bottom 10%.
Cranking Up the Speed to Better Mobile Ad Performance
Accelerating the ad serving process on mobile devices increased the click-through rates by 12%.
Firefox & Page Load Speed
Mozilla cut 2.2 seconds off the average page load time and increased download conversions by 15.4%
AutoAnything Increased Sales by 12-13%
AutoAnything lowered the page load time by 50% which resulted in 12-13% more sales.
Google Experiments on the Search Results Page
Users exposed to a 400 ms delay did 0.44% fewer searches during the first three weeks of the experiment.
Exceptional Website Performance With YSlow 2.0
Yahoo noticed 9% traffic growth for each 400 ms of faster page load time.
Improving Netflix Performance
Bill Scott from Netflix describes how they reduced the bandwidth costs by 43% after using GZip.
Customers Are Won or Lost in One Second
Aberdeen surveyed over 160 organizations to examine the best practices for optimizing web performance.
Greg Linden Talk at Stanford
Greg Linden explains how 100 ms lost during the page load result in a 1% drop in conversion rate for Amazon.
Marissa Mayer at Web 2.0
Google ran an expirement and found that half a second delay caused a 20% drop in traffic.