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core-js vs React

Based on 1582 and 1022 real audits

View core-js details | View React details
Metriccore-jsReactWinner
Performance3638React
Accessibility8889React
Best Practices8487React
SEO9193React
Security6567React
TTFB374ms332msReact
Composite7274React
Performance
core-js
36
React
38
Accessibility
core-js
88
React
89
Security
core-js
65
React
67
SEO
core-js
91
React
93
Composite
core-js
72
React
74

React outperforms core-js in 7 of 7 categories, with a stronger composite score (74 vs 72). core-js leads in no categories.

When to choose core-js

core-js doesn't clearly lead React 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 React

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

How this comparison was built

Scores are medians across 1582 audited core-js sites and 1022 audited React 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 React?
Based on real BeaverCheck audits, React sites score higher on Lighthouse performance (38 vs 36 on average).
Which has better security, core-js or React?
React sites score higher on security analysis (67 vs 65 on average).
Which has better accessibility, core-js or React?
Accessibility scores measured by Lighthouse WCAG 2.1 checks favor React (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 React?
React sites score higher on Lighthouse SEO signals (93 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 React?
React sites show lower Time to First Byte (332 ms vs 374 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 React for my website?
Both platforms have trade-offs. React 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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