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Respect NEXT_HASH_SALT for server side assetsHashes#95738

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Respect NEXT_HASH_SALT for server side assetsHashes#95738
mischnic wants to merge 3 commits into
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mischnic/salt-assetsHashes

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github-actions Bot commented Jul 13, 2026

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Tests Passed

Commit: e7f12e9

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Stats from current PR

✅ No significant changes detected

📊 All Metrics
📖 Metrics Glossary

Dev Server Metrics:

  • Listen = TCP port starts accepting connections
  • First Request = HTTP server returns successful response
  • Cold = Fresh build (no cache)
  • Warm = With cached build artifacts

Build Metrics:

  • Fresh = Clean build (no .next directory)
  • Cached = With existing .next directory

Change Thresholds:

  • Time: Changes < 50ms AND < 10%, OR < 2% are insignificant
  • Size: Changes < 1KB AND < 1% are insignificant
  • All other changes are flagged to catch regressions

⚡ Dev Server

Metric Canary PR Change Trend
Cold (Listen) 813ms 813ms ▇▁▂▇▂
Cold (Ready in log) 773ms 786ms █▁▁█▂
Cold (First Request) 1.285s 1.323s █▁▁█▂
Warm (Listen) 813ms 813ms ▇▁▁█▂
Warm (Ready in log) 781ms 792ms █▁▁█▂
Warm (First Request) 1.292s 1.332s █▂▂█▁
📦 Dev Server (Webpack) (Legacy)

📦 Dev Server (Webpack)

Metric Canary PR Change Trend
Cold (Listen) 813ms 813ms ▂▂▂▂▂
Cold (Ready in log) 788ms 786ms ▁▁▂▁▂
Cold (First Request) 3.384s 3.463s ▂▂▂▁▂
Warm (Listen) 813ms 813ms ▂▂▂▂▂
Warm (Ready in log) 790ms 786ms ▁▂▁▁▂
Warm (First Request) 3.464s 3.426s ▁▁▁▁▂

⚡ Production Builds

Metric Canary PR Change Trend
Fresh Build 5.111s 5.177s ▇▁▂█▃
Cached Build 5.195s 5.182s ▇▁▂▇▃
📦 Production Builds (Webpack) (Legacy)

📦 Production Builds (Webpack)

Metric Canary PR Change Trend
Fresh Build 25.886s 25.661s ▂▂▂▁▂
Cached Build 25.741s 25.396s ▂▁▁▁▂
node_modules Size 516 MB 516 MB █████
📦 Bundle Sizes

Bundle Sizes

⚡ Turbopack

Client

Main Bundles
Canary PR Change
03gmyxr7dukvs.js gzip 10.3 kB N/A -
03kxtldm3sk2x.js gzip 153 B N/A -
040t1q17lo593.js gzip 8.77 kB N/A -
0bb0vtp8dwsez.js gzip 450 B N/A -
0cz1d0mv5g_q7.js gzip 39.4 kB 39.4 kB
0d9_sdfmlgx3x.js gzip 156 B N/A -
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16cqqcigykfea.js gzip 13.6 kB N/A -
17h18zxt1915l.js gzip 1.46 kB N/A -
1elt1qium-r2m.css gzip 115 B 115 B
1fq1h7dxad4cv.js gzip 9.44 kB N/A -
1fym-adbk_69_.js gzip 13.1 kB N/A -
1g80-jfls9qyr.js gzip 13.2 kB N/A -
1gav7nfh4y8ln.js gzip 8.76 kB N/A -
1ljh0cxv8ewm7.js gzip 156 B N/A -
1w8vqo51u2z7m.js gzip 155 B N/A -
256hcvivlx119.js gzip 155 B N/A -
26xnr0078vuee.js gzip 71.1 kB N/A -
28ligxg2pcqgb.js gzip 153 B N/A -
2jh0hejcskd4k.js gzip 162 B N/A -
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4237vdj6eyslt.js gzip 8.7 kB N/A -
turbopack-0_..vf3q.js gzip 3.86 kB N/A -
turbopack-0w..ldhz.js gzip 3.85 kB N/A -
turbopack-1e..9rsa.js gzip 3.85 kB N/A -
turbopack-1v..y-5d.js gzip 3.85 kB N/A -
turbopack-1v..hah-.js gzip 3.85 kB N/A -
turbopack-2c..me-e.js gzip 3.85 kB N/A -
turbopack-2f..t0ne.js gzip 3.85 kB N/A -
turbopack-2m..jwnj.js gzip 3.85 kB N/A -
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turbopack-2r..p_fq.js gzip 3.85 kB N/A -
turbopack-2y..v7d3.js gzip 3.85 kB N/A -
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05tax4x1rfda4.js gzip N/A 7.4 kB -
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1uqman5iy_ejn.js gzip N/A 156 B -
2-phc9obd3nyd.js gzip N/A 8.77 kB -
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2fhjq6ek3srmr.js gzip N/A 8.69 kB -
2g0t7upz_v-hf.js gzip N/A 10.6 kB -
2ghzkgx1ddgu_.js gzip N/A 157 B -
2ia9qqy99aie9.js gzip N/A 13.6 kB -
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2m-y5z-jn6d95.js gzip N/A 155 B -
2oza28kdqvoay.js gzip N/A 8.74 kB -
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30h_m0irj-q6p.js gzip N/A 221 B -
319hk3fl01uhk.js gzip N/A 71.1 kB -
37ejbfx1u9lpo.js gzip N/A 8.75 kB -
38c63ct4i1cy7.js gzip N/A 449 B -
38i6xpn0ullxe.js gzip N/A 155 B -
3hd1us4ordyc9.js gzip N/A 13.2 kB -
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3olzqw8v8kq4p.js gzip N/A 160 B -
3otxp6kbeequz.js gzip N/A 156 B -
3su6a4l8jbfth.js gzip N/A 3.53 kB -
3w25ccsfocdnd.js gzip N/A 159 B -
3wb4pe4z4-aim.js gzip N/A 8.77 kB -
40j0uuoh0xxc2.js gzip N/A 155 B -
40k6sbmro-wy8.js gzip N/A 45.8 kB -
turbopack-05..ztdo.js gzip N/A 3.85 kB -
turbopack-05..tsib.js gzip N/A 3.85 kB -
turbopack-12..zapb.js gzip N/A 3.85 kB -
turbopack-19..g7-6.js gzip N/A 3.85 kB -
turbopack-1y..7z80.js gzip N/A 3.83 kB -
turbopack-2i..cubw.js gzip N/A 3.86 kB -
turbopack-2v..f86f.js gzip N/A 3.85 kB -
turbopack-2w..l3g5.js gzip N/A 3.85 kB -
turbopack-2x..mykf.js gzip N/A 3.85 kB -
turbopack-2x..xsyd.js gzip N/A 3.85 kB -
turbopack-3_..obhu.js gzip N/A 3.85 kB -
turbopack-35..p4jp.js gzip N/A 3.85 kB -
turbopack-3f..ggdw.js gzip N/A 3.85 kB -
turbopack-3o..gklp.js gzip N/A 3.85 kB -
Total 449 kB 449 kB ⚠️ +43 B

Server

Middleware
Canary PR Change
middleware-b..fest.js gzip 732 B 726 B
Total 732 B 726 B ✅ -6 B
Build Details
Build Manifests
Canary PR Change
_buildManifest.js gzip 432 B 436 B
Total 432 B 436 B ⚠️ +4 B

📦 Webpack

Client

Main Bundles
Canary PR Change
2486.HASH.js gzip 169 B N/A -
3146-HASH.js gzip 64 kB N/A -
39fcf99b-HASH.js gzip 62.9 kB N/A -
8443-HASH.js gzip 4.68 kB N/A -
9431-HASH.js gzip 5.62 kB N/A -
framework-HASH.js gzip 59.8 kB 59.8 kB
main-app-HASH.js gzip 257 B 254 B 🟢 3 B (-1%)
main-HASH.js gzip 39.7 kB 40.1 kB 🔴 +453 B (+1%)
webpack-HASH.js gzip 1.68 kB 1.68 kB
6105-HASH.js gzip N/A 5.63 kB -
764.HASH.js gzip N/A 169 B -
8898-HASH.js gzip N/A 63.4 kB -
9597-HASH.js gzip N/A 4.65 kB -
e1ccab69-HASH.js gzip N/A 62.9 kB -
Total 239 kB 239 kB ✅ -201 B
Polyfills
Canary PR Change
polyfills-HASH.js gzip 39.4 kB 39.4 kB
Total 39.4 kB 39.4 kB
Pages
Canary PR Change
_app-HASH.js gzip 194 B 194 B
_error-HASH.js gzip 183 B 182 B
css-HASH.js gzip 335 B 335 B
dynamic-HASH.js gzip 1.8 kB 1.8 kB
edge-ssr-HASH.js gzip 255 B 254 B
head-HASH.js gzip 351 B 349 B
hooks-HASH.js gzip 384 B 384 B
image-HASH.js gzip 580 B 580 B
index-HASH.js gzip 259 B 259 B
link-HASH.js gzip 2.49 kB 2.49 kB
routerDirect..HASH.js gzip 319 B 319 B
script-HASH.js gzip 386 B 386 B
withRouter-HASH.js gzip 315 B 313 B
1afbb74e6ecf..834.css gzip 106 B 106 B
Total 7.96 kB 7.95 kB ✅ -7 B

Server

Edge SSR
Canary PR Change
edge-ssr.js gzip 128 kB 128 kB
page.js gzip 283 kB 284 kB
Total 410 kB 412 kB ⚠️ +2.17 kB
Middleware
Canary PR Change
middleware-b..fest.js gzip 615 B 615 B
middleware-r..fest.js gzip 156 B 155 B
middleware.js gzip 44.9 kB 44.9 kB
edge-runtime..pack.js gzip 842 B 842 B
Total 46.5 kB 46.5 kB ✅ -5 B
Build Details
Build Manifests
Canary PR Change
_buildManifest.js gzip 719 B 720 B
Total 719 B 720 B ⚠️ +1 B
Build Cache
Canary PR Change
0.pack gzip 4.79 MB 4.78 MB 🟢 7.72 kB (0%)
index.pack gzip 119 kB 118 kB 🟢 1.52 kB (-1%)
index.pack.old gzip 119 kB 118 kB
Total 5.03 MB 5.02 MB ✅ -9.56 kB

🔄 Shared (bundler-independent)

Runtimes
Canary PR Change
app-page-exp...dev.js gzip 363 kB 363 kB
app-page-exp..prod.js gzip 201 kB 201 kB
app-page-tur...dev.js gzip 363 kB 363 kB
app-page-tur..prod.js gzip 201 kB 201 kB
app-page-tur...dev.js gzip 359 kB 359 kB
app-page-tur..prod.js gzip 199 kB 199 kB
app-page.run...dev.js gzip 360 kB 360 kB
app-page.run..prod.js gzip 199 kB 199 kB
app-route-ex...dev.js gzip 81.1 kB 81.1 kB
app-route-ex..prod.js gzip 55.2 kB 55.2 kB
app-route-tu...dev.js gzip 81.1 kB 81.1 kB
app-route-tu..prod.js gzip 55.2 kB 55.2 kB
app-route-tu...dev.js gzip 80.7 kB 80.7 kB
app-route-tu..prod.js gzip 55 kB 55 kB
app-route.ru...dev.js gzip 80.7 kB 80.7 kB
app-route.ru..prod.js gzip 54.9 kB 54.9 kB
dist_client_...dev.js gzip 324 B 324 B
dist_client_...dev.js gzip 326 B 326 B
dist_client_...dev.js gzip 318 B 318 B
dist_client_...dev.js gzip 317 B 317 B
pages-api-tu...dev.js gzip 45.2 kB 45.2 kB
pages-api-tu..prod.js gzip 34 kB 34 kB
pages-api.ru...dev.js gzip 45.2 kB 45.2 kB
pages-api.ru..prod.js gzip 33.9 kB 33.9 kB
pages-turbo....dev.js gzip 54.7 kB 54.7 kB
pages-turbo...prod.js gzip 39.6 kB 39.6 kB
pages.runtim...dev.js gzip 54.7 kB 54.7 kB
pages.runtim..prod.js gzip 39.6 kB 39.6 kB
server.runti..prod.js gzip 65.3 kB 65.3 kB
use-cache-pr...dev.js gzip 71.4 kB 71.4 kB
use-cache-pr...dev.js gzip 71.4 kB 71.4 kB
use-cache-pr...dev.js gzip 69.7 kB 69.7 kB
use-cache-pr...dev.js gzip 69.7 kB 69.7 kB
Total 3.48 MB 3.48 MB ⚠️ +1 B
📎 Tarball URL
https://vercel-packages.vercel.app/next/commits/e7f12e9860cd1760db8b2760f3ba7fdf5abbb1fa/next

Commit: e7f12e9

@mischnic mischnic force-pushed the mischnic/salt-assetsHashes branch from 0997463 to e7f12e9 Compare July 13, 2026 18:59
.with_context(|| format!("failed to get source for module {ident_str}"))?
.content()
.hash(HashAlgorithm::Xxh3Hash128Hex)
.hash(hash_salt, HashAlgorithm::Xxh3Hash128Hex)

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The durable use-cache code_hash was salted with NEXT_HASH_SALT (via output_hash_salt()), causing all durable 'use cache' entries to be spuriously invalidated across deployments whenever the salt changes.

Fix on Vercel

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