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Your site vs. core-js average

Your site
69
core-js average
73
CategoryYour scorePeer avgDeltaPercentile
Performance6772-5—
Security6366-3—
Accessibility5660-4—
SEO7790-13—
Infrastructure9086+4—
Compliance7377-4—
Content9182+9—
Sustainability68680—

Better than 8% of core-js sites

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Category: JavaScript libraries

core-js

Based on 1701 real audits

36
Avg. Performance
88
Avg. Accessibility
84
Avg. Best Practices
91
Avg. SEO
66
Avg. Security
73
Avg. Composite
36 /100
Avg. Performance
399 ms
Avg. TTFB
73 /100
Avg. Composite
1701
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 67/100.

Recent Audits

View adoption trends → See all 1576 websites using core-js →
SitePerformanceGradeAudited
unmineable.wordpress.com58B2026-09-02
accenture.wd103.myworkdayjobs.com/de-DE/AccentureCareers24B2026-09-02
shopaccino.com44B2026-09-02
www.rsea.com.au3C2026-09-01
www.mbda-systems.com47B2026-08-28
baomoi.com45B2026-08-28
usatf.org24C2026-08-28
www.sazimebudoucnost.cz56B2026-08-28
alfajrkeffiyeh.com35B2026-08-28
warriorsuccesssystems.com72B2026-08-27

Commonly Used With

Sites that use core-js also commonly use:

Open Graph Miscellaneous 1443Google Search Console Analytics 1272Google Tag Manager Tag managers 1253Google Analytics Analytics 988Microsoft Analytics 883jQuery JavaScript libraries 851HSTS Security 800Priority Hints Performance 773Facebook SDK Analytics 587Google Workspace Email 575

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 Google Workspace

FAQ

What is the average Lighthouse performance score for core-js sites?
Based on 1701 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 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 399ms based on 1701 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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