Performance Insights

BETA

Learn what improvements can have the greatest impact on your site's performance

Analyze

How this works:

We download and modify your code to use performance best practices
Run Lighthouse on the modified page, to measure the impact on performance

Testing uses Google PageSpeed Insights for mobile

Partytown 🎉 highlighted in Smashing Magazine

"Builder.io aims to make high performance the default. Partytown is pivotal in making near-zero-JavaScript websites attainable for anyone."

Steve Sewell, Builder's CEO on Smashing Magazine

Why does performance matter?

Put simply: slow sites deter visitors, costing conversions

Every 100ms faster → 1% more conversions

For Mobify, every 100ms decrease in homepage load speed worked out to a 1.11% increase in session-based conversion, yielding an average annual revenue increase of nearly $380,000.

50% faster → 12% more sales

When AutoAnything reduced page load time by half, they saw a boost of 12% to 13% in sales.

20% faster → 10% more conversions

Retailer Furniture Village audited their site speed and developed a plan to address the problems they found, leading to a 20% reduction in page load time and a 10% increase in conversion rate.

40% faster → 15% more signups

Pinterest reduced perceived wait times by 40% and this increased search engine traffic and sign-ups by 15%.

850ms faster → 7% more conversions

COOK reduced average page load time by 850 milliseconds which increased conversions by 7%, decreased bounce rates by 7%, and increased pages per session by 10%.

1 seconds slowness → 10% less users

The BBC found they lost an additional 10% of users for every additional second their site took to load.

Source: web.dev