Audio and video payload on Wix sites

Sites with no audio or video requests audio and video payload have a good LCP most often: 93%, against 92% of all Wix sites. Sites with under 500 KB of audio/video media media payload have it least often, at 89%.

Sites with under 500 KB of audio/video media audio and video payload have a good INP most often: 100%, against 100% of all Wix sites. Sites with no audio or video requests media payload have it least often, at 100%.

No audio or video requests is the most used: 75.6% of Wix sites.

Across the four LCP sub-parts in Chrome's field data, the largest gap between no audio or video requests and under 500 KB of audio/video media sits in resource load delay: 465 ms median for no audio or video requests against 503 ms for under 500 KB of audio/video media. Overall median field LCP is 1.2s for no audio or video requests (TTFB 362 ms, load delay 465 ms, load duration 257 ms, render delay 140 ms) versus 1.3s for under 500 KB of audio/video media.

Across the four LCP sub-parts in Chrome's field data, the largest gap between no audio or video requests and under 500 KB of audio/video media sits in resource load delay: 465 ms median for no audio or video requests against 503 ms for under 500 KB of audio/video media. Overall median field LCP is 1.2s for no audio or video requests (TTFB 362 ms, load delay 465 ms, load duration 257 ms, render delay 140 ms) versus 1.3s for under 500 KB of audio/video media.

React sets the audio and video payload to no audio or video requests on 76% of its sites, and 92% of React sites have a good LCP, against 92% of all sites.

React sets the audio and video payload to no audio or video requests on 76% of its sites, and 100% of React sites have a good INP, against 100% of all sites.

FrameworkAudio and video payload on its sitesGood LCP

All Wix sites 5,621 sitesNo audio/video media 76%Light media (under 500 KB) 14%92%

React 5,620 sitesNo audio/video media 76%Light media (under 500 KB) 14%92%

No audio/video media Light media (under 500 KB) Heavy media (over 3 MB) Medium media (500 KB to 3 MB)

Does the framework explain the audio and video payload difference?

On React, 93% of sites with no audio or video requests audio and video payload have a good LCP, against 89% of React sites with under 500 KB of audio/video media. Within React, sites with no audio or video requests and under 500 KB of audio/video media have a good LCP about equally often.

On React, 100% of sites with under 500 KB of audio/video media audio and video payload have a good INP, against 100% of React sites with no audio or video requests. Within React, sites with under 500 KB of audio/video media and no audio or video requests have a good INP about equally often.

How autoplaying video streams saturate initial bandwidth

When a <video> tag loads without preload="none" or an optimized poster image, the browser fetches megabytes of video segments concurrently with critical stylesheets and hero assets. Across 4,251 sites (75.6%) with no initial media requests, 93% pass field LCP at a 1.2s median, versus 89% (1.3s median) under 500 KB and 93% (1.1s median) above 3 MB.