Turbopack: use camel case for import attributes by mischnic · Pull Request #91317 · vercel/next.js

mischnic · 2026-03-13T14:19:04Z

We already use turbopackLoaderOptions, so let's do the same for turbopack-transition and turbopack-chunking-type

mischnic · 2026-03-13T14:19:22Z

Turbopack: use camel case for import attributes #91317 👈 (View in Graphite)
Turbopack: require(/* turbopackChunkingType: parallel */ #91278 : 1 other dependent PR (#91279 )
[turbopack] Remove turbo_tasks::function from ModuleReference getters #91229
canary

This stack of pull requests is managed by Graphite. Learn more about stacking.

nextjs-bot · 2026-03-13T14:43:22Z

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 (Webpack) (Legacy)

📦 Dev Server (Webpack)

Metric	Canary	PR	Change	Trend
Cold (Listen)	455ms	455ms	✓	▆▆▃▆▃
Cold (Ready in log)	435ms	436ms	✓	▇█▇█▁
Cold (First Request)	1.842s	1.866s	✓	▃▅▄▄▁
Warm (Listen)	455ms	455ms	✓	█▁▁▁▁
Warm (Ready in log)	434ms	436ms	✓	▅▆▆▆▁
Warm (First Request)	1.873s	1.885s	✓	▄▅▅▄▁

📦 Production Builds (Webpack) (Legacy)

📦 Production Builds (Webpack)

Metric	Canary	PR	Change	Trend
Fresh Build	14.226s	14.302s	✓	▁▁▂▁▁
Cached Build	14.442s	14.490s	✓	▁▂▁▁▁
node_modules Size	482 MB	482 MB	✓	▁▁▁▁▁

📦 Bundle Sizes

Bundle Sizes

📦 Webpack

Client

Main Bundles

	Canary	PR	Change
5528-HASH.js gzip	5.54 kB	N/A	-
6280-HASH.js gzip	59.9 kB	N/A	-
6335.HASH.js gzip	169 B	N/A	-
912-HASH.js gzip	4.59 kB	N/A	-
e8aec2e4-HASH.js gzip	62.7 kB	N/A	-
framework-HASH.js gzip	59.7 kB	59.7 kB	✓
main-app-HASH.js gzip	255 B	254 B	✓
main-HASH.js gzip	39.2 kB	39.2 kB	✓
webpack-HASH.js gzip	1.68 kB	1.68 kB	✓
262-HASH.js gzip	N/A	4.59 kB	-
2889.HASH.js gzip	N/A	169 B	-
5602-HASH.js gzip	N/A	5.55 kB	-
6948ada0-HASH.js gzip	N/A	62.7 kB	-
9544-HASH.js gzip	N/A	60.6 kB	-
Total	234 kB	235 kB	⚠️ +722 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	180 B	🟢 3 B (-2%)
css-HASH.js gzip	331 B	330 B	✓
dynamic-HASH.js gzip	1.81 kB	1.81 kB	✓
edge-ssr-HASH.js gzip	256 B	256 B	✓
head-HASH.js gzip	351 B	352 B	✓
hooks-HASH.js gzip	384 B	383 B	✓
image-HASH.js gzip	580 B	581 B	✓
index-HASH.js gzip	260 B	260 B	✓
link-HASH.js gzip	2.51 kB	2.51 kB	✓
routerDirect..HASH.js gzip	320 B	319 B	✓
script-HASH.js gzip	386 B	386 B	✓
withRouter-HASH.js gzip	315 B	315 B	✓
1afbb74e6ecf..834.css gzip	106 B	106 B	✓
Total	7.98 kB	7.98 kB	✅ -1 B

Server

Edge SSR

	Canary	PR	Change
edge-ssr.js gzip	125 kB	125 kB	✓
page.js gzip	268 kB	267 kB	✓
Total	393 kB	392 kB	✅ -277 B

Middleware

	Canary	PR	Change
middleware-b..fest.js gzip	618 B	615 B	✓
middleware-r..fest.js gzip	156 B	155 B	✓
middleware.js gzip	43.8 kB	43.9 kB	✓
edge-runtime..pack.js gzip	842 B	842 B	✓
Total	45.4 kB	45.5 kB	⚠️ +63 B

Build Details

Build Manifests

	Canary	PR	Change
_buildManifest.js gzip	715 B	718 B	✓
Total	715 B	718 B	⚠️ +3 B

Build Cache

	Canary	PR	Change
0.pack gzip	4.26 MB	4.26 MB	✓
index.pack gzip	109 kB	108 kB	✓
index.pack.old gzip	109 kB	109 kB	✓
Total	4.48 MB	4.48 MB	✅ -4 kB

🔄 Shared (bundler-independent)

Runtimes

	Canary	PR	Change
app-page-exp...dev.js gzip	332 kB	332 kB	✓
app-page-exp..prod.js gzip	180 kB	180 kB	✓
app-page-tur...dev.js gzip	332 kB	332 kB	✓
app-page-tur..prod.js gzip	180 kB	180 kB	✓
app-page-tur...dev.js gzip	328 kB	328 kB	✓
app-page-tur..prod.js gzip	178 kB	178 kB	✓
app-page.run...dev.js gzip	329 kB	329 kB	✓
app-page.run..prod.js gzip	178 kB	178 kB	✓
app-route-ex...dev.js gzip	76 kB	76 kB	✓
app-route-ex..prod.js gzip	51.7 kB	51.7 kB	✓
app-route-tu...dev.js gzip	76 kB	76 kB	✓
app-route-tu..prod.js gzip	51.7 kB	51.7 kB	✓
app-route-tu...dev.js gzip	75.6 kB	75.6 kB	✓
app-route-tu..prod.js gzip	51.5 kB	51.5 kB	✓
app-route.ru...dev.js gzip	75.5 kB	75.5 kB	✓
app-route.ru..prod.js gzip	51.4 kB	51.4 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	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	62.4 kB	✓
Total	2.95 MB	2.95 MB	⚠️ +1 B

📎 Tarball URL

https://vercel-packages.vercel.app/next/commits/61e86c153197b391b30fd4a559941c8c3b773ca5/next

codspeed-hq · 2026-03-13T14:45:57Z

Merging this PR will degrade performance by 3.3%

❌ 1 regressed benchmark
✅ 16 untouched benchmarks
⏩ 3 skipped benchmarks¹

⚠️ Please fix the performance issues or acknowledge them on CodSpeed.

Performance Changes

	Mode	Benchmark	`BASE`	`HEAD`	Efficiency
❌	Simulation	`packages-bundle.js[full]`	1 s	1 s	-3.3%

_{Comparing mischnic/rename-turbopack-chunking-type (61e86c1) with canary (855f0a3)}

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. ↩

nextjs-bot · 2026-03-13T14:51:06Z

Failing test suites

Commit: 61e86c1 | About building and testing Next.js

pnpm test-dev-turbo test/development/app-dir/instant-navs-devtools/instant-navs-devtools.test.ts (turbopack) (job)

instant-nav-panel > should auto-open panel on page load when cookie is already set (DD)

Expand output

● instant-nav-panel › should auto-open panel on page load when cookie is already set

page.waitForSelector: Timeout 10ms exceeded.
Call log:
  - waiting for locator('[data-instant-nav-client]') to be visible
  -   locator resolved to visible <button class="action-button" data-instant-nav-client="true">…</button>

  525 |
  526 |     return this.startChain(async () => {
> 527 |       const el = await page.waitForSelector(selector, {
      |                             ^
  528 |         timeout,
  529 |         state,
  530 |       })

  at waitForSelector (lib/browsers/playwright.ts:527:29)
  at Playwright._chain (lib/browsers/playwright.ts:657:23)
  at Playwright._chain [as startChain] (lib/browsers/playwright.ts:638:17)
  at Playwright.startChain [as waitForElementByCss] (lib/browsers/playwright.ts:526:17)
  at Playwright.waitForElementByCss (lib/browsers/playwright.ts:419:17)
  at elementByCssInstant (development/app-dir/instant-navs-devtools/instant-navs-devtools.test.ts:34:19)
  at Object.clickStartClientNav (development/app-dir/instant-navs-devtools/instant-navs-devtools.test.ts:165:11)
  at Proxy._chain (lib/browsers/playwright.ts:657:23)
  at Proxy._chain (lib/browsers/playwright.ts:633:17)
  at Proxy.continueChain (lib/browsers/playwright.ts:477:17)
  at click (development/app-dir/instant-navs-devtools/instant-navs-devtools.test.ts:34:68)
  at Object.clickStartClientNav (development/app-dir/instant-navs-devtools/instant-navs-devtools.test.ts:165:11)

pnpm test-start-turbo test/production/deterministic-build/deployment-id.test.ts (turbopack) (job)

deterministic build - changing deployment id > build output API - standard builder > should produce identical build outputs even when changing deployment id (DD)

Expand output

● deterministic build - changing deployment id › build output API - standard builder › should produce identical build outputs even when changing deployment id

thrown: "Exceeded timeout of 60000 ms for a test.
Add a timeout value to this test to increase the timeout, if this is a long-running test. See https://jestjs.io/docs/api#testname-fn-timeout."

  50 |       }
  51 |
> 52 |       const result = Reflect.apply(target, thisArg, args)
     |                              ^
  53 |       return typeof result === 'function' ? wrapJestTestFn(result) : result
  54 |     },
  55 |     get(target, prop, receiver) {

  at Object.apply (lib/e2e-utils/index.ts:52:30)
  at it (production/deterministic-build/deployment-id.test.ts:261:7)
      at Array.forEach (<anonymous>)
  at production/deterministic-build/deployment-id.test.ts:233:6
  at Object.<anonymous> (production/deterministic-build/deployment-id.test.ts:207:58)

pnpm test-start-turbo test/e2e/app-dir/optimistic-routing/optimistic-routing.test.ts (turbopack) (job)

optimistic-routing > optional catch-all: predicts from index to path with segments (DD)
optimistic-routing > rewrite detection: detects dynamic rewrite when URL does not match route structure (DD)

Expand output

● optimistic-routing › optional catch-all: predicts from index to path with segments

thrown: "Exceeded timeout of 60000 ms for a test.
Add a timeout value to this test to increase the timeout, if this is a long-running test. See https://jestjs.io/docs/api#testname-fn-timeout."

  50 |       }
  51 |
> 52 |       const result = Reflect.apply(target, thisArg, args)
     |                              ^
  53 |       return typeof result === 'function' ? wrapJestTestFn(result) : result
  54 |     },
  55 |     get(target, prop, receiver) {

  at Object.apply (lib/e2e-utils/index.ts:52:30)
  at it (e2e/app-dir/optimistic-routing/optimistic-routing.test.ts:145:3)
  at Object.describe (e2e/app-dir/optimistic-routing/optimistic-routing.test.ts:36:1)

● optimistic-routing › rewrite detection: detects dynamic rewrite when URL does not match route structure

thrown: "Exceeded timeout of 60000 ms for a test.
Add a timeout value to this test to increase the timeout, if this is a long-running test. See https://jestjs.io/docs/api#testname-fn-timeout."

  50 |       }
  51 |
> 52 |       const result = Reflect.apply(target, thisArg, args)
     |                              ^
  53 |       return typeof result === 'function' ? wrapJestTestFn(result) : result
  54 |     },
  55 |     get(target, prop, receiver) {

  at Object.apply (lib/e2e-utils/index.ts:52:30)
  at it (e2e/app-dir/optimistic-routing/optimistic-routing.test.ts:325:3)
  at Object.describe (e2e/app-dir/optimistic-routing/optimistic-routing.test.ts:36:1)

nextjs-bot added created-by: Turbopack team PRs by the Turbopack team. Turbopack Related to Turbopack with Next.js. type: next labels Mar 13, 2026

mischnic mentioned this pull request Mar 13, 2026

Turbopack: require(/* turbopackChunkingType: parallel */ #91278

Merged

mischnic changed the title ~~Turbopack: consistently rename to turbopackChunkingType~~ Turbopack: use camel case for import attributes Mar 13, 2026

mischnic mentioned this pull request Mar 13, 2026

Turbopack: emit/collect #91100

Draft

2 tasks

This was referenced Mar 13, 2026

Turbopack: reimplement server actions using emit/collect #91212

Draft

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

Open

mischnic changed the base branch from mischnic/require-turbopackChunkingType to graphite-base/91317 March 13, 2026 15:06

mischnic marked this pull request as ready for review March 13, 2026 16:01

mischnic force-pushed the graphite-base/91317 branch from 6fbb825 to 7a620f4 Compare March 13, 2026 16:01

mischnic force-pushed the mischnic/rename-turbopack-chunking-type branch from 4d40d7f to 16ae770 Compare March 13, 2026 16:01

mischnic changed the base branch from graphite-base/91317 to mischnic/require-turbopackChunkingType March 13, 2026 16:02

mischnic changed the base branch from mischnic/require-turbopackChunkingType to graphite-base/91317 March 13, 2026 18:19

mischnic mentioned this pull request Mar 13, 2026

[turbopack] Remove turbo_tasks::function from ModuleReference getters #91229

Merged

mischnic requested a review from a team March 13, 2026 19:02

mmastrac approved these changes Mar 13, 2026

View reviewed changes

mischnic force-pushed the graphite-base/91317 branch from 7a620f4 to f1eb8a9 Compare March 14, 2026 10:52

mischnic force-pushed the mischnic/rename-turbopack-chunking-type branch from 16ae770 to 5d55a22 Compare March 14, 2026 10:52

mischnic changed the base branch from graphite-base/91317 to mischnic/require-turbopackChunkingType March 14, 2026 10:52

mischnic changed the base branch from mischnic/require-turbopackChunkingType to graphite-base/91317 March 14, 2026 12:05

Turbopack: consistently rename to turbopackChunkingType

0b4c9c4

mischnic force-pushed the graphite-base/91317 branch from f1eb8a9 to 855f0a3 Compare March 14, 2026 12:07

mischnic force-pushed the mischnic/rename-turbopack-chunking-type branch from 5d55a22 to 3142bc8 Compare March 14, 2026 12:07

graphite-app bot changed the base branch from graphite-base/91317 to canary March 14, 2026 12:08

turbopackTransition

61e86c1

mischnic force-pushed the mischnic/rename-turbopack-chunking-type branch from 3142bc8 to 61e86c1 Compare March 14, 2026 12:08

Provide feedback

Saved searches

Use saved searches to filter your results more quickly

Turbopack: use camel case for import attributes#91317

Turbopack: use camel case for import attributes#91317
mischnic wants to merge 2 commits intocanaryfrom
mischnic/rename-turbopack-chunking-type

mischnic commented Mar 13, 2026 •

edited

Loading

Uh oh!

mischnic commented Mar 13, 2026 •

edited

Loading

Uh oh!

nextjs-bot commented Mar 13, 2026 •

edited

Loading

📦 Dev Server (Webpack)

📦 Production Builds (Webpack)

Bundle Sizes

📦 Webpack

🔄 Shared (bundler-independent)

Uh oh!

codspeed-hq bot commented Mar 13, 2026 •

edited

Loading

Uh oh!

nextjs-bot commented Mar 13, 2026 •

edited

Loading

Uh oh!

Reviewers

Assignees

Labels

Projects

Milestone

Development

Uh oh!

3 participants

Conversation

mischnic commented Mar 13, 2026 • edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

Uh oh!

mischnic commented Mar 13, 2026 • edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

Uh oh!

nextjs-bot commented Mar 13, 2026 • edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

Stats from current PR

✅ No significant changes detected

📦 Dev Server (Webpack)

📦 Production Builds (Webpack)

Bundle Sizes

📦 Webpack

🔄 Shared (bundler-independent)

Uh oh!

codspeed-hq bot commented Mar 13, 2026 • edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

Merging this PR will degrade performance by 3.3%

Performance Changes

Footnotes

Uh oh!

nextjs-bot commented Mar 13, 2026 • edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

Failing test suites

Uh oh!

Reviewers

Assignees

Labels

Projects

Milestone

Development

Uh oh!

3 participants

mischnic commented Mar 13, 2026 •

edited

Loading

mischnic commented Mar 13, 2026 •

edited

Loading

nextjs-bot commented Mar 13, 2026 •

edited

Loading

codspeed-hq bot commented Mar 13, 2026 •

edited

Loading

nextjs-bot commented Mar 13, 2026 •

edited

Loading