What is LCP by connection type
LCP by connection type shows the Largest Contentful Paint (LCP) broken down by the user’s estimated network quality at the time of page load. This lens helps you understand how connection speed and stability impact the perceived performance of your site.
The connection type shown here is not the literal physical connection (e.g. Wi-Fi or Ethernet), but rather the effective connection type inferred by the browser. It's based on real-time measurements of download speed and latency.
The list shows only connection types that generated traffic to your website during the selected period.
Reported type | What it actually means |
5G | Very fast and low latency — often strong Wi-Fi, Ethernet, or 5G |
4G | Good performance — typical for stable Wi-Fi or solid mobile data |
3G | Moderate speed — may include higher latency or slower downloads |
2G | Poor speed — expect noticeable delays, especially for heavy content |
Slow 2G | Very constrained connection — suitable only for lightweight pages or fallback content |
LCP is the most popular vital from the Core Web Vitals and represents the loading time of the largest element on the page.
Healthy LCP by connection type
Should you worry
In a healthy scenario, LCP remains green for users with 4g and 5g effective types, since these represent the majority of real-world experiences. Slightly higher LCP for 3g or 2g is acceptable - but should never cross into yellow or red zones if the page is properly optimized.
Fast connections should not experience slow LCP. If they do, the issue is likely not network-related.
Unhealthy LCP by connection type
Let’s say 4G and 5G users are seeing poor LCP - that’s a red flag. These categories often include users on strong Wi-Fi or Ethernet, so the performance problem likely comes from:
Render-blocking scripts or too much JS on the critical path.
Poor image optimization.
Layout shifts or complex DOMs delaying the paint of the largest element.
Server or CDN latency issues, despite the client’s fast connection.
If users on “fast” effective types are struggling, you’ve got a clear opportunity to improve perceived performance.
Resolving unhealthy LCP by connection type
Go-to action plan to resolve an unhealthy LCP by connection type:
Ask Uxi to analyze your LCP by connection type values and suggest improvements.
Use Filters to focus on the slow connection types in your LCP by connection type, then look across the other LCP lenses to find which ones show the slowest LCPs with the most pageviews.
Simulate LCP of the suspected lens to see if fixing it will resolve the slow LCP by connection type. If yes, this is where the resolution focus should be.
Use an automated LCP optimization tool like Navigation AI to improve your LCP by connection type.
Once you’ve improved LCP, set an alert to be the first to know if it starts worsening again.
Try it yourself
Discover how your website performs with real user data.