Every time a user clicks into a website, it’s a race to capture their attention—whoever can deliver content faster wins the next click and conversion.
Cloudflare’s latest Speed Brain feature uses AI to pre-download the web pages that users are likely to click next, boosting your website loading speed by up to 45%, and in experiments, it can reach up to 75%!
Why is the website still “lagging”? The problem is often not the network, but “we’re too slow before the user clicks.”
In the traditional web loading process, every time a user clicks a link, the browser must resend the request, wait for the server response, load HTML, CSS, JS, and image resources, and then display them on the screen.
Even if the website already uses Cloudflare CDN, Argo Smart Routing, Smart Caching, etc., each page switch still causes delays, especially in scenarios like shopping websites or news platforms where “multi-page quick switching” is more obvious.
Speed Brain predicts user behavior and preloads the next page into the browser cache before the click, achieving a smooth experience of “instant appearance upon click.”
How does Speed Brain achieve this? From “pre-fetching resources” to “pre-loading pages”
Cloudflare uses a new standard called Speculation Rules API, allowing the browser to actively pre-fetch the next page’s content based on user interactions (such as mouse movements, clicks).
Features of Speed Brain include:
✅ No setup required, effective upon activation
✅ Only pre-fetches content in the CDN cache to avoid risks
✅ Smart prediction of user next step behavior
✅ Only targets static pages, does not pre-fetch dynamic content to avoid errors
✅ Integrates with Cloudflare RUM to analyze real user effectiveness
Test Results: LCP reduced by 45%, up to 75%!
Cloudflare tested Speed Brain on tens of millions of domains and found:
📉 Largest Contentful Paint (LCP) reduced by an average of 0.88 to 1.1 seconds
📈 When pre-fetching is successful, LCP reduction averages 45%
⚡ For users with browser support (such as Chrome, Edge), loading speed is significantly improved
ANP Observation: These 3 types of websites are most suitable for using Speed Brain
- Brand image official website: Multiple page navigation, rich images
- B2B product pages: Users will browse multiple introduction pages
- Shopping websites/e-commerce platforms: Users frequently click on categories and product pages
We recommend these types of websites to enable Speed Brain along with RUM performance analysis to observe the actual improvement.
How to enable?
Speed Brain can be quickly enabled in the Cloudflare control panel:
📍 Path: Speed > Optimization > Content Optimization > Speed Brain
✅ Free Plan is enabled by default
✅ Pro/Business/Enterprise plans need manual activation
Enabling RUM analysis simultaneously can help you track performance indicators (such as LCP, Load Time) to see if they improve.
Want to make your website faster? Let Speed Brain think ahead for you!
If CDN helps bring content closer to users, then Speed Brain helps “guess what users want and prepare it in advance.” Combined with Cloudflare’s full-site architecture advantages and AI predictions, your website will no longer lag behind!
📩 Feel free to contact ANP Technology today, we will assist you in implementing Speed Brain along with optimal performance planning!
