Turbopack: emit/collect followups by mischnic · Pull Request #91474 · vercel/next.js

mischnic · 2026-03-16T21:43:22Z

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mischnic · 2026-03-16T21:43:37Z

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Turbopack: emit/collect followups #91474 👈 (View in Graphite)
Turbopack: reimplement server actions using emit/collect #91212
Turbopack: emit/collect #91100
Turbopack: use ChunkGroupEntry::Shared, part 2 #91279
Turbopack: require(/* turbopackChunkingType: parallel */ #91278 : 1 other dependent PR (#91317 )
[turbopack] Remove turbo_tasks::function from ModuleReference getters #91229
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nextjs-bot · 2026-03-16T21:59:03Z

Failing test suites

Commit: 34649c5 | About building and testing Next.js

pnpm test-start-turbo test/production/app-dir/actions-tree-shaking/basic/basic.test.ts (turbopack) (job)

actions-tree-shaking - reexport > should not tree-shake namespace exports the manifest (DD)

Expand output

● actions-tree-shaking - reexport › should not tree-shake namespace exports the manifest

expect(received).toMatchInlineSnapshot(snapshot)

Snapshot name: `actions-tree-shaking - reexport should not tree-shake namespace exports the manifest 1`

- Snapshot  - 0
+ Received  + 5

@@ -1,25 +1,30 @@
  {
    "app/named-reexport/client/page": [
      "app/named-reexport/client/actions.js#sharedClientLayerAction",
+     "app/named-reexport/client/actions.js#unusedClientLayerAction1",
+     "app/named-reexport/client/actions.js#unusedClientLayerAction2",
    ],
    "app/named-reexport/server/page": [
      "app/named-reexport/server/actions.js#sharedServerLayerAction",
      "app/named-reexport/server/actions.js#unusedServerLayerAction1",
      "app/named-reexport/server/actions.js#unusedServerLayerAction2",
    ],
    "app/namespace-reexport-2/client/page": [
      "app/namespace-reexport-2/actions/action-modules.js#action",
+     "app/namespace-reexport-2/nested.js#foo",
      "app/namespace-reexport-2/nested.js#getFoo",
    ],
    "app/namespace-reexport-2/server/page": [
      "app/namespace-reexport-2/actions/action-modules.js#action",
      "app/namespace-reexport-2/nested.js#foo",
      "app/namespace-reexport-2/nested.js#getFoo",
    ],
    "app/namespace-reexport/client/page": [
      "app/namespace-reexport/client/actions.js#sharedClientLayerAction",
+     "app/namespace-reexport/client/actions.js#unusedClientLayerAction1",
+     "app/namespace-reexport/client/actions.js#unusedClientLayerAction2",
    ],
    "app/namespace-reexport/server/page": [
      "app/namespace-reexport/server/actions.js#sharedServerLayerAction",
      "app/namespace-reexport/server/actions.js#unusedServerLayerAction1",
      "app/namespace-reexport/server/actions.js#unusedServerLayerAction2",

  17 |       const actionsRoutesState = await getActionsRoutesStateByRuntime(next)
  18 |
> 19 |       expect(actionsRoutesState).toMatchInlineSnapshot(`
     |                                  ^
  20 |        {
  21 |          "app/named-reexport/client/page": [
  22 |            "app/named-reexport/client/actions.js#sharedClientLayerAction",

  at Object.toMatchInlineSnapshot (production/app-dir/actions-tree-shaking/reexport/reexport.test.ts:19:34)

pnpm test-start-turbo test/production/app-dir/actions-tree-shaking/reexport/reexport-edge.test.ts (turbopack) (job)

actions-tree-shaking - reexport > should not tree-shake namespace exports the manifest (DD)

Expand output

● actions-tree-shaking - reexport › should not tree-shake namespace exports the manifest

expect(received).toMatchInlineSnapshot(snapshot)

Snapshot name: `actions-tree-shaking - reexport should not tree-shake namespace exports the manifest 1`

- Snapshot  - 0
+ Received  + 5

@@ -1,25 +1,30 @@
  {
    "app/named-reexport/client/page": [
      "app/named-reexport/client/actions.js#sharedClientLayerAction",
+     "app/named-reexport/client/actions.js#unusedClientLayerAction1",
+     "app/named-reexport/client/actions.js#unusedClientLayerAction2",
    ],
    "app/named-reexport/server/page": [
      "app/named-reexport/server/actions.js#sharedServerLayerAction",
      "app/named-reexport/server/actions.js#unusedServerLayerAction1",
      "app/named-reexport/server/actions.js#unusedServerLayerAction2",
    ],
    "app/namespace-reexport-2/client/page": [
      "app/namespace-reexport-2/actions/action-modules.js#action",
+     "app/namespace-reexport-2/nested.js#foo",
      "app/namespace-reexport-2/nested.js#getFoo",
    ],
    "app/namespace-reexport-2/server/page": [
      "app/namespace-reexport-2/actions/action-modules.js#action",
      "app/namespace-reexport-2/nested.js#foo",
      "app/namespace-reexport-2/nested.js#getFoo",
    ],
    "app/namespace-reexport/client/page": [
      "app/namespace-reexport/client/actions.js#sharedClientLayerAction",
+     "app/namespace-reexport/client/actions.js#unusedClientLayerAction1",
+     "app/namespace-reexport/client/actions.js#unusedClientLayerAction2",
    ],
    "app/namespace-reexport/server/page": [
      "app/namespace-reexport/server/actions.js#sharedServerLayerAction",
      "app/namespace-reexport/server/actions.js#unusedServerLayerAction1",
      "app/namespace-reexport/server/actions.js#unusedServerLayerAction2",

  17 |       const actionsRoutesState = await getActionsRoutesStateByRuntime(next)
  18 |
> 19 |       expect(actionsRoutesState).toMatchInlineSnapshot(`
     |                                  ^
  20 |        {
  21 |          "app/named-reexport/client/page": [
  22 |            "app/named-reexport/client/actions.js#sharedClientLayerAction",

  at Object.toMatchInlineSnapshot (production/app-dir/actions-tree-shaking/reexport/reexport.test.ts:19:34)

pnpm test-start-turbo test/production/app-dir/actions-tree-shaking/shared-module-actions/shared-module-actions.test.ts (turbopack) (job)

actions-tree-shaking - shared-module-actions > should not have the unused action in the manifest (DD)

Expand output

● actions-tree-shaking - shared-module-actions › should not have the unused action in the manifest

expect(received).toMatchInlineSnapshot(snapshot)

Snapshot name: `actions-tree-shaking - shared-module-actions should not have the unused action in the manifest 1`

- Snapshot  - 0
+ Received  + 4

@@ -1,11 +1,15 @@
  {
    "app/client/one/page": [
      "app/client/actions.js#sharedClientLayerAction",
+     "app/client/actions.js#unusedClientLayerAction1",
+     "app/client/actions.js#unusedClientLayerAction2",
    ],
    "app/client/two/page": [
      "app/client/actions.js#sharedClientLayerAction",
+     "app/client/actions.js#unusedClientLayerAction1",
+     "app/client/actions.js#unusedClientLayerAction2",
    ],
    "app/server/one/page": [
      "app/server/actions.js#sharedServerLayerAction",
      "app/server/actions.js#unusedServerLayerAction1",
      "app/server/actions.js#unusedServerLayerAction2",

  14 |     it('should not have the unused action in the manifest', async () => {
  15 |       const actionsRoutesState = await getActionsRoutesStateByRuntime(next)
> 16 |       expect(actionsRoutesState).toMatchInlineSnapshot(`
     |                                  ^
  17 |        {
  18 |          "app/client/one/page": [
  19 |            "app/client/actions.js#sharedClientLayerAction",

  at Object.toMatchInlineSnapshot (production/app-dir/actions-tree-shaking/shared-module-actions/shared-module-actions.test.ts:16:34)

codspeed-hq · 2026-03-16T22:05:16Z

Merging this PR will not alter performance

✅ 17 untouched benchmarks
⏩ 3 skipped benchmarks¹

_{Comparing mischnic/emit-collect-followup (34649c5) with mischnic/emit-collect-server-actions (ed6f396)²}

3 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩
No successful run was found on mischnic/emit-collect-server-actions (07e6aaa) during the generation of this report, so 2df89ba was used instead as the comparison base. There might be some changes unrelated to this pull request in this report. ↩

nextjs-bot · 2026-03-16T22:12:07Z

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)	455ms	455ms	✓	█▁▁▁▁
Cold (Ready in log)	439ms	438ms	✓	█▁▁▁▂
Cold (First Request)	1.159s	1.137s	✓	█▂▂▁▃
Warm (Listen)	457ms	457ms	✓	█▁▁▁▁
Warm (Ready in log)	442ms	444ms	✓	█▁▁▁▁
Warm (First Request)	351ms	346ms	✓	█▁▁▁▁

📦 Dev Server (Webpack) (Legacy)

📦 Dev Server (Webpack)

Metric	Canary	PR	Change	Trend
Cold (Listen)	456ms	455ms	✓	▁█▁▁▃
Cold (Ready in log)	437ms	438ms	✓	▃█▃▁▃
Cold (First Request)	1.969s	1.976s	✓	▂█▂▁▂
Warm (Listen)	456ms	456ms	✓	▁█▁▁▁
Warm (Ready in log)	439ms	440ms	✓	▃█▃▁▃
Warm (First Request)	1.973s	1.995s	✓	▂█▂▁▂

⚡ Production Builds

Metric	Canary	PR	Change	Trend
Fresh Build	3.891s	3.802s	✓	█▃▃▂▁
Cached Build	3.738s	3.770s	✓	█▃▂▂▁

📦 Production Builds (Webpack) (Legacy)

📦 Production Builds (Webpack)

Metric	Canary	PR	Change	Trend
Fresh Build	14.338s	14.392s	✓	▁█▁▁▁
Cached Build	14.557s	14.706s	✓	▁█▁▁▂
node_modules Size	483 MB	483 MB	✓	█████

📦 Bundle Sizes

Bundle Sizes

⚡ Turbopack

Client

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	Canary	PR	Change
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	Canary	PR	Change
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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	43.3 kB	43.3 kB	✓
pages-api-tu..prod.js gzip	33 kB	33 kB	✓
pages-api.ru...dev.js gzip	43.3 kB	43.3 kB	✓
pages-api.ru..prod.js gzip	33 kB	33 kB	✓
pages-turbo....dev.js gzip	52.7 kB	52.7 kB	✓
pages-turbo...prod.js gzip	38.6 kB	38.6 kB	✓
pages.runtim...dev.js gzip	52.7 kB	52.7 kB	✓
pages.runtim..prod.js gzip	38.6 kB	38.6 kB	✓
server.runti..prod.js gzip	62.4 kB	62.5 kB	✓
Total	2.95 MB	2.95 MB	⚠️ +390 B

📝 Changed Files (9 files)

Files with changes:

app-page-exp..ntime.dev.js
app-page-exp..time.prod.js
app-page-tur..ntime.dev.js
app-page-tur..time.prod.js
app-page-tur..ntime.dev.js
app-page-tur..time.prod.js
app-page.runtime.dev.js
app-page.runtime.prod.js
server.runtime.prod.js

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📎 Tarball URL

https://vercel-packages.vercel.app/next/commits/543ee603d4ac66d6c6acbc24d15d70d4f1ea5749/next

next-app-route Transition

34649c5

nextjs-bot added created-by: Turbopack team PRs by the Turbopack team. Turbopack Related to Turbopack with Next.js. labels Mar 16, 2026

This was referenced Mar 16, 2026

Turbopack: emit/collect #91100

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Turbopack: reimplement server actions using emit/collect #91212

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mischnic changed the title ~~next-app-route Transition~~ Turbopack: emit/collect followups Mar 16, 2026

mischnic mentioned this pull request Mar 16, 2026

Turbopack: use ChunkGroupEntry::Shared, part 2 #91279

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