Connection and preload hints on Wix sites

Sites with no resource hints connection and preload hints have a good LCP most often: 95%, against 94% of all Wix sites. Sites with both preconnect and preload hints connection hints have it least often, at 88%.

Preload hints without preconnect is the most used: 92.0% of Wix sites. No resource hints is 5.1% of Wix sites.

Across the four LCP sub-parts in Chrome's field data, the largest gap between no resource hints and both preconnect and preload hints sits in time to first byte (TTFB): 349 ms median for no resource hints against 507 ms for both preconnect and preload hints. Overall median field LCP is 1.2s for no resource hints (TTFB 349 ms, load delay 505 ms, load duration 142 ms, render delay 162 ms) versus 1.4s for both preconnect and preload hints.

On React, 92% of sites use preload hints without preconnect connection and preload hints, and 94% of React sites have a good LCP, against 94% of all sites.

FrameworkConnection and preload hints on its sitesGood LCP

All Wix sites 5,621 sitesPreload without preconnect 92%94%

React 5,620 sitesPreload without preconnect 92%94%

Preload without preconnect No resource hints Both preconnect and preload Preconnect without preload

Does the framework explain the connection and preload hints difference?

On React, 95% of sites with no resource hints connection and preload hints have a good LCP, against 94% of React sites with preload hints without preconnect. Within React, sites with no resource hints and preload hints without preconnect have a good LCP about equally often.