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core-js vs unpkg

Based on 1571 and 145 real audits

View core-js details | View unpkg details
Metriccore-jsunpkgWinner
Performance3635core-js
Accessibility8889unpkg
Best Practices8483core-js
SEO9189core-js
Security6564core-js
TTFB371ms296msunpkg
Composite7272Tie
Performance
core-js
36
unpkg
35
Accessibility
core-js
88
unpkg
89
Security
core-js
65
unpkg
64
SEO
core-js
91
unpkg
89
Composite
core-js
72
unpkg
72

core-js outperforms unpkg in 4 of 7 categories, with a stronger composite score (72 vs 72). unpkg leads in accessibility, TTFB.

When to choose core-js

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

How this comparison was built

Scores are medians across 1571 audited core-js sites and 145 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, core-js sites score higher on Lighthouse performance (36 vs 35 on average).
Which has better security, core-js or unpkg?
core-js sites score higher on security analysis (65 vs 64 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 89 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 (296 ms vs 371 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. core-js 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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