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Your site vs. core-js average

Your site
70
core-js average
73
CategoryYour scorePeer avgDeltaPercentile
Performance6873-5—
Security6166-5—
Accessibility5360-7—
SEO9390+3—
Infrastructure9386+7—
Compliance7477-3—
Content8482+2—
Sustainability6469-5—

Better than 12% of core-js sites

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Category: JavaScript libraries

core-js

Based on 1747 real audits

37
Avg. Performance
88
Avg. Accessibility
85
Avg. Best Practices
91
Avg. SEO
66
Avg. Security
73
Avg. Composite
37 /100
Avg. Performance
424 ms
Avg. TTFB
73 /100
Avg. Composite
1747
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 68/100.

Recent Audits

View adoption trends → See all 1609 websites using core-js →
SitePerformanceGradeAudited
iacesport.com71B2026-09-22
iacesport.com80B2026-09-22
ecolecybele.com30B2026-09-21
mirandawater.com43B2026-09-21
accenture.com25B2026-09-21
/de-DE/AccentureCareers/job/New-York-One-Manhattan-West-C...45B2026-09-21
www.hightolowvoltage.com32B2026-09-21
www.jcl.energy54B2026-09-21
www.hightolowvoltage.com35B2026-09-21
www.maddox.com41C2026-09-21

Commonly Used With

Sites that use core-js also commonly use:

Open Graph Miscellaneous 1483Google Search Console Analytics 1288Google Tag Manager Tag managers 1284Google Analytics Analytics 1015Microsoft Analytics 888jQuery JavaScript libraries 887HSTS Security 820Priority Hints Performance 809Facebook SDK Analytics 606Facebook Pixel Analytics 593

Compare with...

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

FAQ

What is the average Lighthouse performance score for core-js sites?
Based on 1747 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 66/100 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 424ms based on 1747 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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