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core-js vs unpkg

Based on 1932 and 198 real audits

View core-js details | View unpkg details
Metriccore-jsunpkgWinner
Performance3739unpkg
Accessibility8889unpkg
Best Practices8584core-js
SEO9190core-js
Security6869unpkg
TTFB476ms370msunpkg
Composite7475unpkg
Performance
core-js
37
unpkg
39
Accessibility
core-js
88
unpkg
89
Security
core-js
68
unpkg
69
SEO
core-js
91
unpkg
90
Composite
core-js
74
unpkg
75

unpkg outperforms core-js in 5 of 7 categories, with a stronger composite score (75 vs 74). core-js leads in best practices, SEO.

When to choose core-js

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

When to choose unpkg

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

How this comparison was built

Scores are medians across 1932 audited core-js sites and 198 audited unpkg 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, core-js or unpkg?
Based on real BeaverCheck audits, unpkg sites score higher on Lighthouse performance (39 vs 37 on average).
Which has better security, core-js or unpkg?
unpkg sites score higher on security analysis (69 vs 68 on average).
Which has better accessibility, core-js or unpkg?
Accessibility scores measured by Lighthouse WCAG 2.1 checks favor unpkg (89 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, core-js or unpkg?
core-js sites score higher on Lighthouse SEO signals (91 vs 90 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), core-js or unpkg?
unpkg sites show lower Time to First Byte (370 ms vs 476 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 core-js or unpkg for my website?
Both platforms have trade-offs. unpkg scores higher on overall composite score while core-js 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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