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[16.x] [turbopack] Add turbopack_ecmascript and turbopack_wasm's embeded FS to internal_assets_conditions - #96655

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lukesandberg merged 1 commit into
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backport-96600-to-next-16-3
Aug 4, 2026
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[16.x] [turbopack] Add turbopack_ecmascript and turbopack_wasm's embeded FS to internal_assets_conditions#96655
lukesandberg merged 1 commit into
next-16-3from
backport-96600-to-next-16-3

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@lukesandberg lukesandberg commented Aug 4, 2026 •
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Backports #96600 ([turbopack] Add turbopack_ecmascript and turbopack_wasm's embeded FS to internal_assets_conditions) to next-16-3.

@sampoder @lukesandberg
[turbopack] Add turbopack_ecmascript and turbopack_wasm's embeded…
1ae75ec 
… FS to `internal_assets_conditions` (#96600)

Closes #96597; we were wrongly
applying the user-defined transforms to our internal web worker loaders
which caused this bug.

This is a regression caused by
#94372.

(cherry picked from commit 1ba63df)
@lukesandberg
lukesandberg requested a review from sampoder August 4, 2026 18:10
@lukesandberg
lukesandberg marked this pull request as ready for review August 4, 2026 18:10
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Tests Passed

Commit: 1ae75ec

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Stats from current PR

🔴 1 regression

Metric Canary PR Change Trend
Webpack Build Time 26.253s 27.134s 🔴 +881ms (+3%) ▃▆█▁▁
📊 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) 814ms 812ms ✓ ▂█▂▁▂
Cold (Ready in log) 782ms 786ms ✓ ▂█▂▁▁
Cold (First Request) 1.284s 1.313s ✓ ▂█▂▁▁
Warm (Listen) 813ms 812ms ✓ ▂█▂▁▁
Warm (Ready in log) 779ms 782ms ✓ ▂█▂▁▁
Warm (First Request) 1.260s 1.272s ✓ ▆█▆▅▅
📦 Dev Server (Webpack) (Legacy)

📦 Dev Server (Webpack)

Metric Canary PR Change Trend
Cold (Listen) 864ms 816ms ✓ ▅▅█▁▁
Cold (Ready in log) 825ms 817ms ✓ ▂▄█▁▁
Cold (First Request) 3.678s 3.656s ✓ ▂▅█▁▁
Warm (Listen) 864ms 863ms ✓ ▁▅█▁▁
Warm (Ready in log) 834ms 837ms ✓ ▂▄█▁▁
Warm (First Request) 3.741s 3.810s ✓ ▁▄█▁▁

⚡ Production Builds

Metric Canary PR Change Trend
Fresh Build 5.725s 5.744s ✓ ▂█▂▁▁
Cached Build 2.884s 2.960s ✓ ▁▄▁▁▁
📦 Production Builds (Webpack) (Legacy)

📦 Production Builds (Webpack)

Metric Canary PR Change Trend
Fresh Build 26.253s 27.134s 🔴 +881ms (+3%) ▃▆█▁▁
Cached Build 26.888s 26.462s ✓ ▂▄█▁▁
node_modules Size 552 MB 552 MB ✓ █████
📦 Bundle Sizes

Bundle Sizes

⚡ Turbopack

Client

Main Bundles
Canary PR Change
0a-p0meqxynjz.js gzip 10.3 kB N/A -
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0cz1d0mv5g_q7.js gzip 39.4 kB 39.4 kB ✓
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turbopack-2a..ugpk.js gzip N/A 3.84 kB -
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turbopack-3k..sn0o.js gzip N/A 3.85 kB -
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Total 450 kB 450 kB ⚠️ +37 B

Server

Middleware
Canary PR Change
middleware-b..fest.js gzip 778 B 769 B 🟢 9 B (-1%)
Total 778 B 769 B ✅ -9 B
Build Details
Build Manifests
Canary PR Change
_buildManifest.js gzip 434 B 432 B ✓
Total 434 B 432 B ✅ -2 B
Build Cache
Canary PR Change
00000001.sst gzip 11.7 MB 12.8 MB 🔴 +1.12 MB (+10%)
00000002.sst gzip 15.6 MB 13.8 MB 🟢 1.78 MB (-11%)
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00000007.sst gzip 59 B 59 B ✓
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00000026.sst gzip 59 B 59 B ✓
00000027.meta gzip 116 B 116 B ✓
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00000029.meta gzip 370 kB 370 kB ✓
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00000032.sst gzip 59 B 59 B ✓
00000033.meta gzip 116 B 116 B ✓
00000034.meta gzip 324 kB 324 kB ✓
00000035.meta gzip 370 kB 370 kB ✓
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CURRENT gzip 24 B 24 B ✓
LOG gzip 687 B 687 B ✓
Total 80.6 MB 80.5 MB ✅ -70 kB

📦 Webpack

Client

Main Bundles
Canary PR Change
3322-HASH.js gzip 65 kB N/A -
4191.HASH.js gzip 169 B N/A -
7920-HASH.js gzip 4.68 kB N/A -
9784-HASH.js gzip 5.63 kB N/A -
b1ad9f4c-HASH.js gzip 63.2 kB N/A -
framework-HASH.js gzip 59.7 kB 59.7 kB ✓
main-app-HASH.js gzip 254 B 253 B ✓
main-HASH.js gzip 40 kB 40 kB ✓
webpack-HASH.js gzip 1.68 kB 1.68 kB ✓
3577.HASH.js gzip N/A 168 B -
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8590-HASH.js gzip N/A 5.61 kB -
9750-HASH.js gzip N/A 4.69 kB -
a8984546-HASH.js gzip N/A 63.2 kB -
Total 240 kB 241 kB ⚠️ +698 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 193 B ✓
_error-HASH.js gzip 181 B 182 B ✓
css-HASH.js gzip 334 B 331 B ✓
dynamic-HASH.js gzip 1.81 kB 1.81 kB ✓
edge-ssr-HASH.js gzip 255 B 253 B ✓
head-HASH.js gzip 349 B 351 B ✓
hooks-HASH.js gzip 382 B 384 B ✓
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script-HASH.js gzip 384 B 386 B ✓
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1afbb74e6ecf..834.css gzip 106 B 106 B ✓
Total 7.95 kB 7.95 kB ⚠️ +1 B

Server

Edge SSR
Canary PR Change
edge-ssr.js gzip 129 kB 128 kB ✓
page.js gzip 293 kB 293 kB ✓
Total 421 kB 422 kB ⚠️ +236 B
Middleware
Canary PR Change
middleware-b..fest.js gzip 617 B 613 B ✓
middleware-r..fest.js gzip 156 B 156 B ✓
middleware.js gzip 45.8 kB 45.2 kB 🟢 537 B (-1%)
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Total 47.4 kB 46.8 kB ✅ -541 B
Build Details
Build Manifests
Canary PR Change
_buildManifest.js gzip 718 B 718 B ✓
Total 718 B 718 B ✓
Build Cache
Canary PR Change
0.pack gzip 4.87 MB 4.86 MB 🟢 5.89 kB (0%)
index.pack gzip 123 kB 124 kB ✓
index.pack.old gzip 124 kB 123 kB ✓
Total 5.12 MB 5.11 MB ✅ -5.6 kB

🔄 Shared (bundler-independent)

Runtimes
Canary PR Change
app-page-exp...dev.js gzip 373 kB 373 kB ✓
app-page-exp..prod.js gzip 206 kB 206 kB ✓
app-page-tur...dev.js gzip 373 kB 373 kB ✓
app-page-tur..prod.js gzip 206 kB 206 kB ✓
app-page-tur...dev.js gzip 369 kB 369 kB ✓
app-page-tur..prod.js gzip 203 kB 203 kB ✓
app-page.run...dev.js gzip 369 kB 369 kB ✓
app-page.run..prod.js gzip 204 kB 204 kB ✓
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dist_client_...dev.js gzip 317 B 317 B ✓
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pages.runtim..prod.js gzip 39.8 kB 39.8 kB ✓
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use-cache-pr...dev.js gzip 70.4 kB 70.4 kB ✓
Total 4.09 MB 4.09 MB ✓
📎 Tarball URL 
https://vercel-packages.vercel.app/next/commits/1ae75ec3d3a17ebdd1ea50896bf6e2d550ace374/next

Commit: 1ae75ec

@lukesandberg
lukesandberg enabled auto-merge (squash) August 4, 2026 18:11
@lukesandberg
lukesandberg merged commit 6b36778 into next-16-3 Aug 4, 2026
115 checks passed
@lukesandberg
lukesandberg deleted the backport-96600-to-next-16-3 branch August 4, 2026 18:38
@eps1lon eps1lon changed the title [backport] [turbopack] Add turbopack_ecmascript and turbopack_wasm's embeded FS to internal_assets_conditions [16.x] [turbopack] Add turbopack_ecmascript and turbopack_wasm's embeded FS to internal_assets_conditions Aug 6, 2026
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