Explore 5,623 Wix websites
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What moves Core Web Vitals on Wix
Field data findings across Wix sites from our metric deep dives.
78% of Wix hero images use default or eager loading.
Across Wix sites, 70.6% of LCP images use default loading (1.1s median LCP, 94% good LCP) and 7.2% set loading="eager".
100% of Wix sites call scheduler.yield().
Across Wix sites, 99.9% call scheduler.yield() (96% good INP, 79ms median).
Wix sites with zero uncompressed text responses (39.9%) pass LCP at 96% (1.1s median).
Across Wix, 39.9% of sites compress every text payload (96% good LCP, 1.1s median) and 60.1% include at least one uncompressed text response (93% good LCP, 1.2s median).
99.6% of iframe-using Wix sites use default iframe loading (93% good LCP).
Across the 3,240 Wix sites that embed iframes, 99.6% use default iframe loading (93% good LCP) and 1.0% set loading="lazy".
Shifting Wix sites pass field CLS at 96% on lateral shifts and 95% on downward shifts.
Across the 1,024 Wix sites with a lab layout shift, 71.0% record lateral movements (96% good field CLS) and 46.9% record downward shifts (95% good CLS).
Analytics-using Wix sites load Google Analytics 4 on 99.1% of sites (97% good INP).
Across the 1,733 Wix sites with an external analytics provider, 99.1% use Google Analytics 4 (97% field INP pass rate) and 68.4% include Universal Analytics tags.
Wix sites running Google AdSense (99.8% of ad-using Wix sites) pass all three CWV at 80%.
Across the 486 Wix sites that embed display ads, 99.8% use Google AdSense and pass all three Core Web Vitals at 80% (compared with 89% across ad-using Wix sites).
Wix sites with a tag manager use Google Tag Manager on 99.6% of sites (96% good INP).
Across the 1,533 Wix sites with a detected tag manager, 99.6% use Google Tag Manager (96% field INP pass rate).
67 Wix sites install an external CMP (37.3% CookieYes, 25.4% Cookiebot).
Across the 67 Wix sites with a detected third-party CMP script, 37.3% use CookieYes and 25.4% use Cookiebot, with 89% passing all three Core Web Vitals.
Wix sites include CDN and RUM on 100% (89% CWV pass) and external analytics on 30.8%.
Across Wix sites (100%), 100% include RUM telemetry (89% passing all three CWV), 30.8% load external analytics (86% CWV pass), and 27.3% load tag managers (85% CWV pass).
85% of Wix sites have fewer than 1,500 DOM nodes (97% good INP at 400 to 799 nodes).
Across 5,621 Wix sites, 41.8% sit at 400 to 799 DOM elements (97% good INP), 36.1% sit at 800 to 1,499 elements (96% good INP), and 15.0% exceed 1,500 elements (94% good INP).
62.3% of Wix sites have 32+ DOM levels (96% good INP).
Across Wix sites, 62.3% have a maximum DOM depth of 32+ levels (96% good INP) and 37.0% have 21 to 31 levels (96% good INP).
Wix sites without iframes (42.4%) pass CLS at 99%, compared with 96% on sites with 2 to 3 iframes.
Across 5,621 Wix sites, 42.4% use 0 iframes (99% good CLS), 31.2% use 1 iframe (97%), and 20.7% use 2 to 3 iframes (96% good CLS).
81% of Wix sites sit at or below 200ms TBT (97% good INP at 0ms vs 90% over 600ms).
Across 5,621 Wix sites, 37.2% record 0ms lab TBT (97% good INP), 44.2% record 1 to 200ms TBT (97% good INP), and 7.7% exceed 600ms TBT (90% good INP).
On Wix sites with Long Animation Frames, 74.8% occur in event listeners (97% good INP) and 7.0% in timers.
Across LoAF Wix sites, 7.0% record long timer callbacks (93% good INP), 74.8% record long frames in event listeners (97% good INP, 80ms median), and 45.3% record them in classic scripts (98%).
100.0% of Wix sites use fetch() and beacon pings alongside scripts and images (1.1s median LCP).
Across all 5,621 Wix sites, 100.0% execute fetch() requests (94% good LCP, 1.1s median) and 100.0% send ping requests.
100.0% of Wix sites serve Brotli and Gzip subresources (94% good LCP, 1.1s median).
Across 5,621 Wix sites, 100.0% serve Brotli-compressed subresources (94% good LCP, 1.1s median), 100.0% serve Gzip, and 31.5% include Zstandard-encoded responses (90% good LCP).
72% of Wix sites sit in the over 1.5 MB unused JS tier (96% good INP).
Across Wix sites, 72% record over 1.5 MB of unused JS on first load (96% good INP) and 28% record 850 KB to 1.5 MB (96% good INP).
65% of Wix sites have under 300 KB of unused CSS rules.
Across Wix sites, 34% load under 140 KB of unused CSS (96% LCP pass rate, 997ms median) and 31% load 140 to 300 KB (96%), compared with 89% on the 11% above 600 KB.
96% of Wix sites set between 1 and 5 cookies on initial load.
Across Wix sites, 58% set 3 to 5 cookies (95% LCP pass rate) and 38% set 1 to 2 cookies (94% pass rate).
63% of Wix sites complete lab LCP in under 300ms.
Across Wix sites, 63% paint in under 300ms in the lab (96% field LCP pass rate, 1.1s median) compared with 89% on the 21% exceeding 1,500ms.
97% of Wix sites have load delay or TTFB as their largest LCP phase.
Across Wix sites, load delay is the largest LCP sub-part on 50% (98% pass rate, 1.1s median), TTFB on 46% (94%), and render delay on 3% (77% pass rate).
69% of Wix sites transfer under 2.5 MB of total network bytes.
Across Wix sites, 54% transfer 1.2 to 2.5 MB (96% LCP pass rate, 1.1s median), 15% transfer under 1.2 MB (98%, 941ms median), and 12% exceed 5 MB (90%).
Hot questions this edition
Preload, fetchpriority — do the hints help?
LCP by priority hint on the element
Which CMS is fastest?
WordPress, Shopify, Wix, Squarespace ranked
What blocks the main thread?
Top scripts in long animation frames
Are AVIF sites faster?
JPEG, WebP, AVIF, JXL ranked by LCP
Where do the LCP milliseconds go?
TTFB, load delay, load time, render delay
How big is the JavaScript tax on INP?
Script count and weight vs INP
How much shipped JavaScript even runs?
Used vs unused script bytes
Which CDNs hit the lowest TTFB?
Cloudflare, Akamai, Fastly, CloudFront
INP cost of analytics scripts
GA4, Plausible, Fathom, Matomo
DOM size and CLS
How DOM growth correlates with shifts
Or browse the data
120 signals across 13 sections. Use the tree on the left or the search box.
- Headline metrics 5 signals LCP, INP, CLS…
- Tech stack 3 signals CDN (7), CMS (12), Frameworks (11)…
- Third parties 27 signals JS libraries (26), Analytics (20), CMS (17)…
- Main thread 1 signals Top INP blockers (25)…
- LCP Image 8 signals LCP discovery, LCP element type, LCP image format…
- LCP Timing 1 signals LCP phase breakdown…
- Page resources 36 signals Bytes by resource type, Compression mix, Cookies per site…
- INP 6 signals Blocking frame breakdown, CSS hints, INP phase breakdown…
- CLS 5 signals Largest single shift, Layout shift count, Shift concentration…
- CDN & Delivery 12 signals Cache strategy mix, Cacheable responses, Connection hints…
- Synthetic (lab) 4 signals Document lifecycle (lab), Lab paint timeline, Main-thread CPU (lab)…
- Speculation rules 2 signals Speculation eagerness, Speculation posture…
- Tech stack 10 signals Ad networks on page, Analytics on page, CMS…
203,892 crawled sites with Chrome field data, representing millions of real page loads, October 2026 edition. How we measured.