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Your site vs. core-js average

Your site
81
core-js average
74
CategoryYour scorePeer avgDeltaPercentile
Performance8373+10—
Security7567+8—
Accessibility6961+8—
SEO9790+7—
Infrastructure9286+6—
Compliance7877+1—
Content8582+3—
Sustainability8769+18—

Better than 90% of core-js sites

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Category: JavaScript libraries

core-js

Based on 1842 real audits

36
Avg. Performance
88
Avg. Accessibility
85
Avg. Best Practices
91
Avg. SEO
67
Avg. Security
74
Avg. Composite
36 /100
Avg. Performance
439 ms
Avg. TTFB
74 /100
Avg. Composite
1842
Sites Audited

How core-js sites compare

core-js sites tend to score below average on performance (36/100), compared to the global average of 65/100.

Recent Audits

View adoption trends → See all 1655 websites using core-js →
SitePerformanceGradeAudited
plymouthmeetingpa.clothesmentor.com32B2026-10-18
unmineable.wordpress.com45B2026-10-18
hrefs.com29B2026-10-18
dearammi.com40B2026-10-18
ariesdesignstore.com56B2026-10-16
expertroofingwestchester.com32C2026-10-16
expertroofingwestchester.com29C2026-10-16
www.minicabit.com21B2026-10-16
www.voestalpine.com/welding/global-en/37B2026-10-16
toptechplumbingtx.com32C2026-10-15

Commonly Used With

Sites that use core-js also commonly use:

Open Graph Miscellaneous 1570Google Tag Manager Tag managers 1349Google Search Console Analytics 1310Google Analytics Analytics 1076jQuery JavaScript libraries 950Microsoft Analytics 900Priority Hints Performance 878HSTS Security 865Facebook SDK Analytics 630Facebook Pixel Analytics 618

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 1842 real audits, core-js sites score an average of 36/100 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 1842 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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