| Metric | Heap | Underscore.js | Winner |
|---|---|---|---|
| Performance | 27 | 35 | Underscore.js |
| Accessibility | 90 | 87 | Heap |
| Best Practices | 79 | 77 | Heap |
| SEO | 100 | 89 | Heap |
| Security | 58 | 66 | Underscore.js |
| TTFB | 63ms | 1225ms | Heap |
| Composite | 71 | 71 | Tie |
Heap outperforms Underscore.js in 4 of 7 categories, with a stronger composite score (71 vs 71). Underscore.js leads in performance, security.
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