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Your site vs. core-js average

Your site
68
core-js average
73
CategoryYour scorePeer avgDeltaPercentile
Performance6773-6—
Security5867-9—
Accessibility5861-3—
SEO9290+2—
Infrastructure8586-1—
Compliance7277-5—
Content7682-6—
Sustainability6269-7—

Better than 4% of core-js sites

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Category: JavaScript libraries

core-js

Based on 1810 real audits

37
Avg. Performance
88
Avg. Accessibility
85
Avg. Best Practices
91
Avg. SEO
67
Avg. Security
73
Avg. Composite
37 /100
Avg. Performance
430 ms
Avg. TTFB
73 /100
Avg. Composite
1810
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 67/100.

Recent Audits

View adoption trends → See all 1637 websites using core-js →
SitePerformanceGradeAudited
manuelmedina.me97B2026-10-03
brettpinegar.com38C2026-10-03
revenuebase.ai45B2026-10-03
ditchcarbon.com32B2026-10-03
www.clay.com26B2026-10-03
www.presentandperform.com48B2026-10-02
www.lindaschlapfer.com30C2026-10-02
www.lindaschlapfer.com36C2026-10-02
www.jsrcgroup.com32B2026-10-02
www.jsrcgroup.com32B2026-10-02

Commonly Used With

Sites that use core-js also commonly use:

Open Graph Miscellaneous 1542Google Tag Manager Tag managers 1327Google Search Console Analytics 1303Google Analytics Analytics 1056jQuery JavaScript libraries 929Microsoft Analytics 893Priority Hints Performance 860HSTS Security 848Facebook SDK Analytics 621Facebook Pixel Analytics 609

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 1810 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 430ms based on 1810 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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