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Your site vs. core-js average

Your site
68
core-js average
74
CategoryYour scorePeer avgDeltaPercentile
Performance7473+1—
Security6467-3—
Accessibility4461-17—
SEO8590-5—
Infrastructure7786-9—
Compliance7277-5—
Content6582-17—
Sustainability7469+5—

Better than 4% of core-js sites

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Category: JavaScript libraries

core-js

Based on 1850 real audits

37
Avg. Performance
88
Avg. Accessibility
85
Avg. Best Practices
91
Avg. SEO
67
Avg. Security
74
Avg. Composite
37 /100
Avg. Performance
439 ms
Avg. TTFB
74 /100
Avg. Composite
1850
Sites Audited

How core-js sites compare

core-js sites tend to score below average on performance (37/100), compared to the global average of 64/100.

Recent Audits

View adoption trends → See all 1664 websites using core-js →
SitePerformanceGradeAudited
www.morrisandking.com30B2026-10-18
castleware.com27B2026-10-18
dotique.co.uk27B2026-10-18
smoochiebaby.com38B2026-10-18
dilussoclothing.com49B2026-10-18
www.amberandnoah.co.uk28B2026-10-18
originalmindsapparel.com29B2026-10-18
raptonline.co.nz20B2026-10-18
houseoflacuna.com28B2026-10-18
plymouthmeetingpa.clothesmentor.com32B2026-10-18

Commonly Used With

Sites that use core-js also commonly use:

Open Graph Miscellaneous 1579Google Tag Manager Tag managers 1354Google Search Console Analytics 1312Google Analytics Analytics 1080jQuery JavaScript libraries 956Microsoft Analytics 900Priority Hints Performance 887HSTS Security 867Facebook SDK Analytics 636Facebook Pixel Analytics 624

Compare with...

core-js vs Open Graphcore-js vs Google Tag Managercore-js vs Google Search Consolecore-js vs Google Analyticscore-js vs jQuerycore-js vs Microsoftcore-js vs Priority Hintscore-js vs HSTScore-js vs Facebook SDKcore-js vs Facebook Pixel

FAQ

What is the average Lighthouse performance score for core-js sites?
Based on 1850 real audits, core-js sites score an average of 37/100 on Lighthouse performance.
How does core-js compare on web security?
core-js sites score an average security grade of 67/100 in BeaverCheck audits.
What is the average page load time for core-js websites?
The average Time to First Byte (TTFB) for core-js sites is 439ms based on 1850 audits.
How can I improve my core-js site's performance?
Run a free audit on BeaverCheck to get specific recommendations for your core-js site. Common issues include render-blocking resources, unoptimized images, and missing caching headers.

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