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cdnjs vs core-js

Based on 411 and 1688 real audits

View cdnjs details | View core-js details
Metriccdnjscore-jsWinner
Performance4236cdnjs
Accessibility8788core-js
Best Practices8684cdnjs
SEO9191Tie
Security6766cdnjs
TTFB377ms396mscdnjs
Composite7473cdnjs
Performance
cdnjs
42
core-js
36
Accessibility
cdnjs
87
core-js
88
Security
cdnjs
67
core-js
66
SEO
cdnjs
91
core-js
91
Composite
cdnjs
74
core-js
73

cdnjs outperforms core-js in 5 of 7 categories, with a stronger composite score (74 vs 73). core-js leads in accessibility.

When to choose cdnjs

Choose cdnjs when your primary concern is server response time and performance. Its audit data shows consistent strength in these areas across the sampled sites.

When to choose core-js

Choose core-js when your primary concern is accessibility. Its audit data shows consistent strength in these areas across the sampled sites.

How this comparison was built

Scores are medians across 411 audited cdnjs sites and 1688 audited core-js sites in the BeaverCheck database. Every audit runs the same 100+ checks — Lighthouse performance, security headers, accessibility, SEO, server response time — against a real URL. No vendor input, no sponsorship, no affiliate links. Read the full methodology →

FAQ

Which is faster, cdnjs or core-js?
Based on real BeaverCheck audits, cdnjs sites score higher on Lighthouse performance (42 vs 36 on average).
Which has better security, cdnjs or core-js?
cdnjs sites score higher on security analysis (67 vs 66 on average).
Which has better accessibility, cdnjs or core-js?
Accessibility scores measured by Lighthouse WCAG 2.1 checks favor core-js (88 vs 87). Both technologies can be made fully accessible with care — the difference reflects common patterns in the sampled sites, not inherent platform limits.
Which is better for SEO, cdnjs or core-js?
cdnjs sites score higher on Lighthouse SEO signals (91 vs 91 on average), which cover meta tags, crawlability, mobile friendliness, and structured data. Content strategy and backlinks still matter more than platform choice for ranking.
Which has faster server response (TTFB), cdnjs or core-js?
cdnjs sites show lower Time to First Byte (377 ms vs 396 ms on average). TTFB depends heavily on hosting and CDN setup rather than the technology itself, but the sampled sites suggest a meaningful difference in common deployment patterns.
Should I choose cdnjs or core-js for my website?
Both platforms have trade-offs. cdnjs scores higher on overall composite score while cdnjs may excel in metrics you care about most. Run a free BeaverCheck audit on a real site using each to compare the metrics relevant to your use case.
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