Connection and preload hints on Wix sites

Sites with preload hints without preconnect connection and preload hints have a good LCP most often: 95%, against 94% of all Wix sites. Sites with no resource hints connection hints have it least often, at 93%.

Preload hints without preconnect is the most used: 92.0% of Wix sites.

Across the four LCP sub-parts in Chrome's field data, the largest gap between preload hints without preconnect and no resource hints sits in time to first byte (TTFB): 406 ms median for preload hints without preconnect against 343 ms for no resource hints. Overall median field LCP is 1.1s for preload hints without preconnect (TTFB 406 ms, load delay 445 ms, load duration 110 ms, render delay 149 ms) versus 1.1s for no resource hints.

React sets the connection and preload hints to preload hints without preconnect on 92% of its sites, 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?

Almost every site with preload hints without preconnect connection and preload hints is a React site, and almost every React site has preload hints without preconnect connection and preload hints, so the data can't tell preload hints without preconnect connection and preload hints and React apart.