Case Study: How a 2-Second Improvement in Page Load Time More Than Doubled Conversions

By
Tammy Everts
-
364
28949

Roughly 70% of online shopping carts are abandoned before checkout, and new findings suggest that slow load times are the number-one culprit. A recent survey* of more than 2,500 online consumers in the US and UK found that two thirds (67%) of UK shoppers and more than half (51%) of those in the US said that site slowness is the top reason they’d abandon a purchase. These are pretty compelling numbers, but what do they mean in real terms for a typical site owner?

What do these findings mean for you?

To test the impact of slow pages on transaction completion, we worked with a brave customer who shared our curiosity. Over a 12-week period, we conducted a split test in which a segment of their web traffic was divided into three sub-segments:

  • Fast: This group received a fully optimized set of pages. (For this experiment, optimal performance was defined as pages that load in less than 5 seconds.) This established the baseline conversion rate for the experiment.
  • Slow (page 1): This group experienced a 2-second delay to the first page in the transaction.
  • Slow (page 3): This group experienced a 2-second delay to the third page in the transaction.

As the results in the table below show, a 2-second delay in load time during a transaction resulted in abandonment rates of up to 87%. This is significantly higher than the baseline abandonment rate of 67%.

If you’re a glass-is-half-full kind of person, here’s the positive spin: making each page in a transaction just 2 seconds faster resulted in more than double the number of completed transactions.

Case study: Impact of page slowdown on transaction completion

Also interesting is the fact that it’s not enough to lure shoppers in with a speedy first page. Slowing down the third page – for shoppers who are at the halfway point of a transaction – caused the bounce rate to jump from 67% to 80%.

What are the most common shopping cart performance culprits?

These are the four most common performance issues we see every day:

1. Too many pages in the checkout process

There’s a reason why companies like Amazon have made it a priority to allow one-click checkout for customers who want to hustle through the purchasing process. They know that each stage in the checkout process is an invitation for attrition.

2. HTTPS/SSL

In our world, the only issue that trumps web performance is security. Your checkout process must be secure, but that security can come with a performance price tag: all that handshaking, encrypting, and decrypting necessarily takes time. Site owners who want to make the checkout process faster should take a look at how their site handles security. (Quick tip: Enable HTTPS content to be cached by the browser, which will help checkout pages render somewhat faster. There’s a myth that HTTPS content can’t be cached, but in actuality this is controllable with response headers, just like HTTP content.)

3. Too many page resources

Enabling browser caching, as explained above, will help with this problem, but you should also take a close look at your checkout pages and weed out extraneous images and other large files. Not only do these files consume unnecessary bandwidth, they’re also distracting when shoppers should be focusing on completing a single task.

4. Third-party service calls

If a site uses third-party services such as address validation, credit card authorization, and analytics, you need to make sure these services are performing quickly and reliably during checkout. This means understanding your service-level agreements (SLAs) with third-party providers and knowing what kind of monitoring and performance reporting these providers offer.

Learn more: Find out how Radware FastView gives you automated real-time acceleration of Web applications, out-of-the-box.

*Adventures in Retail: The other line is faster, Brand Perfect, November 2012

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  57. […] Abandonment rates increase to 87% when there’s a 2-second delay in load time during transaction results. So it’s important to eliminate any steps where they could potentially jump ship. You could speed up your checkout process by implementing quick payment types like PayPal which already store and autofill the user’s info.  On a more technical side, work with your team to decrease  the loading speed of the page. Spreadshirt got theirs down to 4 seconds. […]

  58. […] Abandonment rates increase to 87% when there’s a 2-second delay in load time during transaction results. So it’s important to eliminate any steps where they could potentially jump ship. You could speed up your checkout process by implementing quick payment types like PayPal which already store and autofill the user’s info.  On a more technical side, work with your team to decrease  the loading speed of the page. Spreadshirt got theirs down to 4 seconds.  […]

  73. […] Le taux d’abandon grimpe à 87% lorsque le chargement de la page des résultats excède 2 secondes. Il est donc primordial d’éliminer toutes les étapes au cours desquelles le client serait tenté d’abandonner la transaction et de quitter le navire. Vous pouvez accélérer votre processus de commande en intégrant des moyens de paiement rapides comme PayPal, qui conservent et renseignent automatiquement les données de l’utilisateur. Côté technique, travaillez avec votre équipe IT pour optimiser la vitesse de chargement de la page. Le site Spreadshirt est ainsi parvenu à diminuer cette durée de 4 secondes. […]

  77. […] are willing to visit competitor sites instead of dealing with a slow loading page, according to a Radware Case Study. Kissmetrics echoes this sentiment in their recent overview of How Loading Time Affects your Bottom […]

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  123. Without a doubt slow page load times affect a web pages performance. Many thanks for taking the time to identify how much affect this has. With a lot of traffic now coming from mobile, page loads speeds are becoming more important.

  128. Nice case study. Yeah, i do agree Page load time plays an important role in SEO. A speed loading site always impresses both search engines and users. Nice guide indeed….

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  139. […] If users bounce off your website due to slow loading times, they’re simply not converting. (As a refresher, converting is when a user completes a desired action, such as signing up for your newsletter, sharing on their social media, filling out a form you’ve provided and/or making a purchase.) If your website has a longer checkout or conversion process, a recent study shows that a two-second delay is all it takes to increase checkout abandons to 87%.  […]

  140. […] If users bounce off your website due to slow loading times, they’re simply not converting. (As a refresher, converting is when a user completes a desired action, such as signing up for your newsletter, sharing on their social media, filling out a form you’ve provided and/or making a purchase.) If your website has a longer checkout or conversion process, a recent study shows that a two-second delay is all it takes to increase checkout abandons to 87%.  […]

  142. In 2006, Amazon reported that for every 100 milliseconds they speed up their website, they see a 1% increase in revenue. Then Google announced, in an effort to improve the web, that page speed was a consideration in how they rank search results.

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  149. […] If users bounce off your website due to slow loading times, they’re simply not converting. (As a refresher, converting is when a user completes a desired action, such as signing up for your newsletter, sharing on their social media, filling out a form you’ve provided and/or making a purchase.) If your website has a longer checkout or conversion process, a recent study shows that a two-second delay is all it takes to increase checkout abandons to 87%.  […]

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    • with a conversion rate of 10% when the page speed took longer than 10 seconds. Another study by Radware shows that a 2-second delay in load time during a transaction results even in an 87% cart.
      Please avoid this as it increases your loading time. Stats indicate that a 2-second delay in load times can increase the abandonment rate to 87%.

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