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Your site vs. core-js average

Your site
81
core-js average
74
CategoryYour scorePeer avgDeltaPercentile
Performance7873+5—
Security7867+11—
Accessibility7861+17—
SEO9390+3—
Infrastructure8586-1—
Compliance8477+7—
Content8882+6—
Sustainability7869+9—

Better than 90% of core-js sites

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Category: JavaScript libraries

core-js

Based on 1864 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
437 ms
Avg. TTFB
74 /100
Avg. Composite
1864
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 64/100.

Recent Audits

View adoption trends → See all 1667 websites using core-js →
SitePerformanceGradeAudited
sylvaniaoh.clothesmentor.com54B2026-10-19
elwd.com.au29B2026-10-19
parceltheory.ca38B2026-10-19
lostspringsoutdoors.com65B2026-10-18
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

Commonly Used With

Sites that use core-js also commonly use:

Open Graph Miscellaneous 1582Google Tag Manager Tag managers 1356Google Search Console Analytics 1313Google Analytics Analytics 1082jQuery JavaScript libraries 959Microsoft Analytics 902Priority Hints Performance 891HSTS Security 868Facebook SDK Analytics 638Facebook Pixel Analytics 626

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 1864 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 437ms based on 1864 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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