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Your site vs. core-js average

Your site
71
core-js average
73
CategoryYour scorePeer avgDeltaPercentile
Performance6872-4—
Security5865-7—
Accessibility6259+3—
SEO9990+9—
Infrastructure8486-2—
Compliance8578+7—
Content8283-1—
Sustainability6268-6—

Better than 23% of core-js sites

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Category: JavaScript libraries

core-js

Based on 1637 real audits

36
Avg. Performance
88
Avg. Accessibility
84
Avg. Best Practices
91
Avg. SEO
65
Avg. Security
73
Avg. Composite
36 /100
Avg. Performance
385 ms
Avg. TTFB
73 /100
Avg. Composite
1637
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 57/100.

Recent Audits

View adoption trends → See all 1525 websites using core-js →
SitePerformanceGradeAudited
uniquetechnologies.co64B2026-08-08
sitiscommesse.com70B2026-08-06
sitiscommesse.com75B2026-08-06
www.cattailsenvironmental.com47B2026-08-06
stripchat.com27B2026-08-01
gharbdental.com44C2026-07-31
gharbdental.com67C2026-07-31
www.91servings.in44C2026-07-30
www.91servings.in21C2026-07-30
www.91servings.in22B2026-07-30

Commonly Used With

Sites that use core-js also commonly use:

Open Graph Miscellaneous 1391Google Search Console Analytics 1250Google Tag Manager Tag managers 1210Google Analytics Analytics 951Microsoft Analytics 875jQuery JavaScript libraries 809HSTS Security 770Priority Hints Performance 742Facebook SDK Analytics 565Google Workspace Email 559

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 1637 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 65/100 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 385ms based on 1637 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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