| Metric | core-js | Prototype | Winner |
|---|---|---|---|
| Performance | 37 | 47 | Prototype |
| Accessibility | 88 | 77 | core-js |
| Best Practices | 84 | 86 | Prototype |
| SEO | 91 | 86 | core-js |
| Security | 66 | 66 | Tie |
| TTFB | 421ms | 369ms | Prototype |
| Composite | 73 | 72 | core-js |
core-js and Prototype are closely matched, each leading in different categories. core-js has a composite score of 73 while Prototype scores 72.
Choose core-js when your primary concern is accessibility and SEO. Its audit data shows consistent strength in these areas across the sampled sites.
Choose Prototype when your primary concern is server response time and performance. Its audit data shows consistent strength in these areas across the sampled sites.
Scores are medians across 1726 audited core-js sites and 10 audited Prototype 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 →
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