| Metric | core-js | Shopify | Winner |
|---|---|---|---|
| Performance | 36 | 29 | core-js |
| Accessibility | 89 | 87 | core-js |
| Best Practices | 83 | 79 | core-js |
| SEO | 92 | 95 | Shopify |
| Security | 66 | 66 | Tie |
| TTFB | 337ms | 294ms | Shopify |
| Composite | 73 | 71 | core-js |
core-js outperforms Shopify in 4 of 7 categories, with a stronger composite score (73 vs 71). Shopify leads in SEO, TTFB.
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