Based on 61 and 1582 real audits
| Metric | Backbone.js | core-js | Winner |
|---|---|---|---|
| Performance | 37 | 36 | Backbone.js |
| Accessibility | 86 | 88 | core-js |
| Best Practices | 83 | 84 | core-js |
| SEO | 89 | 91 | core-js |
| Security | 65 | 65 | Tie |
| TTFB | 498ms | 374ms | core-js |
| Composite | 72 | 72 | Tie |
core-js outperforms Backbone.js in 4 of 7 categories, with a stronger composite score (72 vs 72). Backbone.js leads in performance.
Choose Backbone.js when your primary concern is performance. Its audit data shows consistent strength in these areas across the sampled sites.
Choose core-js when your primary concern is server response time and accessibility. Its audit data shows consistent strength in these areas across the sampled sites.
Scores are medians across 61 audited Backbone.js sites and 1582 audited core-js 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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