Skip to content

core-js vs unpkg

Based on 1609 and 160 real audits

View core-js details | View unpkg details
Metriccore-jsunpkgWinner
Performance3638unpkg
Accessibility8889unpkg
Best Practices8484Tie
SEO9190core-js
Security6566unpkg
TTFB384ms352msunpkg
Composite7373Tie
Performance
core-js
36
unpkg
38
Accessibility
core-js
88
unpkg
89
Security
core-js
65
unpkg
66
SEO
core-js
91
unpkg
90
Composite
core-js
73
unpkg
73

unpkg outperforms core-js in 4 of 7 categories, with a stronger composite score (73 vs 73). core-js leads in SEO.

When to choose core-js

Choose core-js when your primary concern is 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 1609 audited core-js sites and 160 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 (38 vs 36 on average).
Which has better security, core-js or unpkg?
unpkg sites score higher on security analysis (66 vs 65 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 (352 ms vs 384 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.
Audit your own site

Send Feedback