Fresh HAR captured for deploy preview 30 and production. PageSpeed values parsed from supplied mobile reports. The preview cuts JS/image bytes and improves Lighthouse mobile score/LCP/TBT versus production, but fresh HAR still shows RSC over the 40s target and a long polluted session span from deploy-preview tooling/monitoring requests.
| metric | prod | preview | delta |
|---|---|---|---|
| Performance | 41 | 67 | +26 |
| FCP | 1.5s | 2.4s | +0.9s |
| LCP | 7.5s | 3.3s | −4.2s |
| TBT | 1,570ms | 820ms | −750ms |
| CLS | 0.001 | 0 | −0.001 |
| Speed Index | 9.3s | 4.4s | −4.9s |
| Payload total | 5,759KiB | 3,044KiB | −2,715KiB |
| Main-thread work | 8.2s | 5.3s | −2.9s |
| Long tasks | 20 | 11 | −9 |
Reports: preview · production
| metric | prod | preview | delta |
|---|---|---|---|
| Requests | 128 | 126 | −2 |
| Session span | 27.26s | 72.73s | +45.47s |
| Body bytes | 14.45MB | 8.21MB | −6.24MB |
| Summed request time | 190.91s | 119.04s | −71.87s |
| Summed wait | 102.34s | 110.21s | +7.86s |
| RSC requests | 17 | 23 | +6 |
| RSC bytes | 1.45MB | 746.7KB | −~724KB |
| RSC summed time | 47.43s | 48.36s | +0.93s |
| JS bytes | 8.11MB | 5.04MB | −3.07MB |
| Image bytes | 2.64MB | 201.3KB | −2.44MB |
PASS Batch 31 gate cleared.
/hedge/* duplicates >2: 0.Claim safe: preview is materially lighter and PageSpeed-mobile better. Claim not safe: all timing improved. HAR has RSC over target and slow duplicated document/RSC/monitoring requests.
Next work: reduce RSC prefetch/fan-out for /about and /world-cup; keep monitoring noise out of perf captures; retest preview without Netlify deploy-preview UI pollution.
Batch 31 gate cascade · Fresh prod-vs-preview cascade · Preview HAR · Prod HAR
Generated with scripts/batch-gate.ts and scripts/analyze-har-cascade.ts. Typecheck note from external checker used pnpm; project package manager is Bun.