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Your site vs. core-js average

Your site
81
core-js average
74
CategoryYour scorePeer avgDeltaPercentile
Performance7573+2—
Security8267+15—
Accessibility8261+21—
SEO9590+5—
Infrastructure8386-3—
Compliance7377-4—
Content7982-3—
Sustainability7169+2—

Better than 90% of core-js sites

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Category: JavaScript libraries

core-js

Based on 1866 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
437 ms
Avg. TTFB
74 /100
Avg. Composite
1866
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 63/100.

Recent Audits

View adoption trends → See all 1679 websites using core-js →
SitePerformanceGradeAudited
www.jennikayne.com29C2026-10-19
suzushiiclothing.com30B2026-10-19
freshproduceclothes.com29B2026-10-19
bearbottomclothing.com32B2026-10-19
www.newforestclothing.co.uk35C2026-10-19
www.woolly.clothing25C2026-10-19
www.drakes.com46C2026-10-19
www.kingkerosin.com27B2026-10-19
oak-clothing-co.myshopify.com34B2026-10-19
marie-nicole-girls-outfits.myshopify.com26C2026-10-19

Commonly Used With

Sites that use core-js also commonly use:

Open Graph Miscellaneous 1594Google Tag Manager Tag managers 1364Google Search Console Analytics 1316Google Analytics Analytics 1090jQuery JavaScript libraries 965Microsoft Analytics 904Priority Hints Performance 902HSTS Security 869Facebook SDK Analytics 644Facebook Pixel Analytics 632

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 1866 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 437ms based on 1866 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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