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cdnjs vs core-js

Based on 461 and 1840 real audits

View cdnjs details | View core-js details
Metriccdnjscore-jsWinner
Performance4337cdnjs
Accessibility8888Tie
Best Practices8785cdnjs
SEO9191Tie
Security6867cdnjs
TTFB399ms439mscdnjs
Composite7474Tie
Performance
cdnjs
43
core-js
37
Accessibility
cdnjs
88
core-js
88
Security
cdnjs
68
core-js
67
SEO
cdnjs
91
core-js
91
Composite
cdnjs
74
core-js
74

cdnjs outperforms core-js in 4 of 7 categories, with a stronger composite score (74 vs 74). core-js leads in no categories.

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

core-js doesn't clearly lead cdnjs in any category on the sampled sites — pick it based on developer experience, ecosystem, or existing team skills rather than the audit scores.

How this comparison was built

Scores are medians across 461 audited cdnjs sites and 1840 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 (43 vs 37 on average).
Which has better security, cdnjs or core-js?
cdnjs sites score higher on security analysis (68 vs 67 on average).
Which has better accessibility, cdnjs or core-js?
Accessibility scores measured by Lighthouse WCAG 2.1 checks favor cdnjs (88 vs 88). 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 (399 ms vs 439 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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