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core-js vs jsDelivr CDN

Based on 1570 and 343 real audits

View core-js details | View jsDelivr CDN details
Metriccore-jsjsDelivr CDNWinner
Performance3638jsDelivr CDN
Accessibility8888Tie
Best Practices8485jsDelivr CDN
SEO9191Tie
Security6565Tie
TTFB371ms359msjsDelivr CDN
Composite7273jsDelivr CDN
Performance
core-js
36
jsDelivr CDN
38
Accessibility
core-js
88
jsDelivr CDN
88
Security
core-js
65
jsDelivr CDN
65
SEO
core-js
91
jsDelivr CDN
91
Composite
core-js
72
jsDelivr CDN
73

jsDelivr CDN outperforms core-js in 4 of 7 categories, with a stronger composite score (73 vs 72). core-js leads in no categories.

When to choose core-js

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

When to choose jsDelivr CDN

Choose jsDelivr CDN 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 1570 audited core-js sites and 343 audited jsDelivr CDN 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 jsDelivr CDN?
Based on real BeaverCheck audits, jsDelivr CDN sites score higher on Lighthouse performance (38 vs 36 on average).
Which has better security, core-js or jsDelivr CDN?
core-js sites score higher on security analysis (65 vs 65 on average).
Which has better accessibility, core-js or jsDelivr CDN?
Accessibility scores measured by Lighthouse WCAG 2.1 checks favor core-js (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, core-js or jsDelivr CDN?
core-js 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), core-js or jsDelivr CDN?
jsDelivr CDN sites show lower Time to First Byte (359 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 jsDelivr CDN for my website?
Both platforms have trade-offs. jsDelivr CDN 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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