100.0% of Wix sites use unencoded binary assets subresource HTTP compression, and 94% of those sites have a good LCP, against 94% of all Wix sites.
The State of Web Vitals · October 2026 · Wix: 5,621 crawled sites · 3,077 with phone field dataBy Arjen Karel · corewebvitals.io/state-of-cwv
Sites with unencoded binary assets subresource HTTP compression have a good LCP most often: 94%, against 94% of all Wix sites. Sites with Zstandard (zstd) compression subresource compression have it least often, at 90%.
SitesGood, needs improvement, poor LCPMedian
All Wix sites3,07794%1.1s
Unencoded binary assets (images / WOFF2) 100.0%3,07794%1.1s
Gzip (Content-Encoding: gzip) 100.0%3,07794%1.1s
Brotli (Content-Encoding: br) 99.9%3,07694%1.1s
Zstandard (Content-Encoding: zstd) 31.5%87890%1.3s
GoodNeeds improvementPoorSites: with Chrome field data
The State of Web Vitals · October 2026 · Wix: 5,621 crawled sites · 3,077 with phone field dataBy Arjen Karel · corewebvitals.io/state-of-cwv
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Subresource HTTP compression usage
Unencoded binary assets is the most used: 100.0% of Wix sites.
Sites using each option (sites can use more than one) 5,621 sites
Unencoded binary assets (images / WOFF2) 100.0% Gzip (Content-Encoding: gzip) 100.0% Brotli (Content-Encoding: br) 99.9%
Unencoded binary assets (images / WOFF2) 100.0% Gzip (Content-Encoding: gzip) 100.0% Brotli (Content-Encoding: br) 99.9% Zstandard (Content-Encoding: zstd) 31.5%
The State of Web Vitals · October 2026 · Wix: 5,621 crawled sites · 3,077 with phone field dataBy Arjen Karel · corewebvitals.io/state-of-cwv
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LCP phase breakdown by subresource compression algorithm
Across the four LCP sub-parts in Chrome's field data, the largest gap between unencoded binary assets and Zstandard (zstd) compression sits in time to first byte (TTFB): 404 ms median for unencoded binary assets against 458 ms for Zstandard (zstd) compression. Overall median field LCP is 1.1s for unencoded binary assets (TTFB 404 ms, load delay 446 ms, load duration 110 ms, render delay 150 ms) versus 1.3s for Zstandard (zstd) compression.
Median LCP phase breakdown (Chrome field p75) Load delay Median LCP
All Wix sites 2,353404 ms446 ms150 ms446 mslab 453 ms1.1s
Brotli (Content-Encoding: br) 2,353404 ms446 ms150 ms446 mslab 453 ms1.1s
Gzip (Content-Encoding: gzip) 2,353404 ms446 ms150 ms446 mslab 453 ms1.1s
Unencoded binary assets (images / WOFF2) 2,353404 ms446 ms150 ms446 mslab 453 ms1.1s
Zstandard (Content-Encoding: zstd) 660458 ms468 ms152 ms468 mslab 477 ms1.3s
TTFB Resource load delay Resource load time Element render delay
The State of Web Vitals · October 2026 · Wix: 5,621 crawled sites · 3,077 with phone field dataBy Arjen Karel · corewebvitals.io/state-of-cwv
4
Subresource HTTP compression per framework
React sets the subresource HTTP compression to unencoded binary assets on 100% of its sites, and 94% of React sites have a good LCP, against 94% of all sites.
FrameworkSubresource HTTP compression on its sitesGood LCP
All Wix sites 5,621 sitesUnencoded binary assets (images / WOFF2) 100%Gzip (Content-Encoding: gzip) 100%Brotli (Content-Encoding: br) 100%Zstandard (Content-Encoding: zstd) 32%94%
React 5,620 sitesUnencoded binary assets (images / WOFF2) 100%Gzip (Content-Encoding: gzip) 100%Brotli (Content-Encoding: br) 100%Zstandard (Content-Encoding: zstd) 32%94% Unencoded binary assets (images / WOFF2) Gzip (Content-Encoding: gzip) Brotli (Content-Encoding: br) Zstandard (Content-Encoding: zstd)
The State of Web Vitals · October 2026 · Wix: 5,621 crawled sites · 3,077 with phone field dataBy Arjen Karel · corewebvitals.io/state-of-cwv
5
Subresource compression or the framework
Does the framework explain the subresource HTTP compression difference?
Almost every site with unencoded binary assets subresource HTTP compression is a React site, and almost every React site has unencoded binary assets subresource HTTP compression, so the data can't tell unencoded binary assets subresource HTTP compression and React apart.
The State of Web Vitals · October 2026 · Wix: 5,621 crawled sites · 3,077 with phone field dataBy Arjen Karel · corewebvitals.io/state-of-cwv