Turbopack: Consistency for compute_async_module_info #88409

sokra · 2026-01-12T09:23:39Z

What?

Use strongly consistent reads for compute_async_module_info to avoid double execution.

sokra · 2026-01-12T09:23:57Z

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nextjs-bot · 2026-01-12T09:24:05Z

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approve CI run for commit: 2187e6b

Note: this should only be enabled once the PR is ready to go and can only be enabled by a maintainer

nextjs-bot · 2026-01-12T09:24:05Z

Allow CI Workflow Run

approve CI run for commit: 2187e6b

Note: this should only be enabled once the PR is ready to go and can only be enabled by a maintainer

nextjs-bot · 2026-01-12T09:52:30Z

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)	456ms	456ms	✓	▁▁▁▁▁
Cold (Ready in log)	444ms	444ms	✓	▆▆▁▅▇
Cold (First Request)	853ms	851ms	✓	█▇▁▇█
Warm (Listen)	456ms	456ms	✓	▁▁▁▁▁
Warm (Ready in log)	444ms	445ms	✓	▁▁▁▁▁
Warm (First Request)	348ms	350ms	✓	▂▃▁▁▁

📦 Dev Server (Webpack) (Legacy)

📦 Dev Server (Webpack)

Metric	Canary	PR	Change	Trend
Cold (Listen)	455ms	455ms	✓	▁▁▁▁▁
Cold (Ready in log)	436ms	435ms	✓	▂▆▅▇▁
Cold (First Request)	1.802s	1.803s	✓	▂▄▃▄▁
Warm (Listen)	456ms	455ms	✓	▁▁▁▁▁
Warm (Ready in log)	436ms	435ms	✓	▁▅▅▅▁
Warm (First Request)	1.822s	1.809s	✓	▁▃▄▄▁

⚡ Production Builds

Metric	Canary	PR	Change	Trend
Fresh Build	4.277s	4.268s	✓	▁▁▂▁▁
Cached Build	4.329s	4.336s	✓	▁▁▂▁▂

📦 Production Builds (Webpack) (Legacy)

📦 Production Builds (Webpack)

Metric	Canary	PR	Change	Trend
Fresh Build	13.888s	13.912s	✓	▁▁▁▁▁
Cached Build	13.964s	13.974s	✓	▂▁▁▁▂
node_modules Size	458 MB	458 MB	✓	▁▁▁▁▁

📦 Bundle Sizes

Bundle Sizes

⚡ Turbopack

Client

Main Bundles: **430 kB** → **430 kB** ✅ -81 B

82 files with content-based hashes (individual files not comparable between builds)

Server

Middleware

	Canary	PR	Change
middleware-b..fest.js gzip	790 B	785 B	✓
Total	790 B	785 B	✅ -5 B

Build Details

Build Manifests

	Canary	PR	Change
_buildManifest.js gzip	449 B	450 B	✓
Total	449 B	450 B	⚠️ +1 B

📦 Webpack

Client

Main Bundles

	Canary	PR	Change
2086.HASH.js gzip	169 B	N/A	-
2161-HASH.js gzip	5.41 kB	N/A	-
2747-HASH.js gzip	4.48 kB	N/A	-
4322-HASH.js gzip	52.3 kB	N/A	-
ec793fe8-HASH.js gzip	62.3 kB	N/A	-
framework-HASH.js gzip	59.8 kB	59.8 kB	✓
main-app-HASH.js gzip	251 B	254 B	🔴 +3 B (+1%)
main-HASH.js gzip	38.6 kB	38.9 kB	✓
webpack-HASH.js gzip	1.68 kB	1.68 kB	✓
1596.HASH.js gzip	N/A	169 B	-
2658-HASH.js gzip	N/A	51.9 kB	-
6349-HASH.js gzip	N/A	4.46 kB	-
7019-HASH.js gzip	N/A	5.43 kB	-
b17a3386-HASH.js gzip	N/A	62.3 kB	-
Total	225 kB	225 kB	✅ -10 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	182 B	182 B	✓
css-HASH.js gzip	336 B	335 B	✓
dynamic-HASH.js gzip	1.8 kB	1.8 kB	✓
edge-ssr-HASH.js gzip	256 B	256 B	✓
head-HASH.js gzip	352 B	349 B	✓
hooks-HASH.js gzip	385 B	384 B	✓
image-HASH.js gzip	580 B	580 B	✓
index-HASH.js gzip	259 B	258 B	✓
link-HASH.js gzip	2.5 kB	2.51 kB	✓
routerDirect..HASH.js gzip	319 B	317 B	✓
script-HASH.js gzip	385 B	387 B	✓
withRouter-HASH.js gzip	316 B	315 B	✓
1afbb74e6ecf..834.css gzip	106 B	106 B	✓
Total	7.97 kB	7.96 kB	✅ -8 B

Server

Edge SSR

	Canary	PR	Change
edge-ssr.js gzip	125 kB	125 kB	✓
page.js gzip	242 kB	237 kB	🟢 4.85 kB (-2%)
Total	366 kB	362 kB	✅ -4.84 kB

Middleware

	Canary	PR	Change
middleware-b..fest.js gzip	652 B	654 B	✓
middleware-r..fest.js gzip	155 B	156 B	✓
middleware.js gzip	33.1 kB	33.3 kB	✓
edge-runtime..pack.js gzip	842 B	842 B	✓
Total	34.8 kB	34.9 kB	⚠️ +179 B

Build Details

Build Manifests

	Canary	PR	Change
_buildManifest.js gzip	738 B	738 B	✓
Total	738 B	738 B	✓

Build Cache

	Canary	PR	Change
0.pack gzip	3.65 MB	3.66 MB	🔴 +9.13 kB (+0%)
index.pack gzip	98.4 kB	98.1 kB	✓
index.pack.old gzip	98.9 kB	98.9 kB	✓
Total	3.85 MB	3.86 MB	⚠️ +8.69 kB

🔄 Shared (bundler-independent)

Runtimes

	Canary	PR	Change
app-page-exp...dev.js gzip	303 kB	303 kB	✓
app-page-exp..prod.js gzip	158 kB	158 kB	✓
app-page-tur...dev.js gzip	303 kB	303 kB	✓
app-page-tur..prod.js gzip	158 kB	158 kB	✓
app-page-tur...dev.js gzip	300 kB	300 kB	✓
app-page-tur..prod.js gzip	156 kB	156 kB	✓
app-page.run...dev.js gzip	300 kB	300 kB	✓
app-page.run..prod.js gzip	156 kB	156 kB	✓
app-route-ex...dev.js gzip	68.8 kB	68.8 kB	✓
app-route-ex..prod.js gzip	47.6 kB	47.6 kB	✓
app-route-tu...dev.js gzip	68.8 kB	68.8 kB	✓
app-route-tu..prod.js gzip	47.6 kB	47.6 kB	✓
app-route-tu...dev.js gzip	68.4 kB	68.4 kB	✓
app-route-tu..prod.js gzip	47.4 kB	47.4 kB	✓
app-route.ru...dev.js gzip	68.4 kB	68.4 kB	✓
app-route.ru..prod.js gzip	47.3 kB	47.3 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	41.2 kB	41.2 kB	✓
pages-api-tu..prod.js gzip	31.3 kB	31.3 kB	✓
pages-api.ru...dev.js gzip	41.1 kB	41.1 kB	✓
pages-api.ru..prod.js gzip	31.2 kB	31.2 kB	✓
pages-turbo....dev.js gzip	50.8 kB	50.8 kB	✓
pages-turbo...prod.js gzip	38.2 kB	38.2 kB	✓
pages.runtim...dev.js gzip	50.7 kB	50.7 kB	✓
pages.runtim..prod.js gzip	38.2 kB	38.2 kB	✓
server.runti..prod.js gzip	62.2 kB	62.2 kB	✓
Total	2.69 MB	2.69 MB	✅ -1 B

nextjs-bot · 2026-01-13T15:51:30Z

Tests Passed

codspeed-hq · 2026-01-13T16:07:13Z

Merging this PR will not alter performance

✅ 17 untouched benchmarks
⏩ 3 skipped benchmarks¹

_{Comparing sokra/compute-async-module-info-consistency (bf2f79f) with canary (cfe29f9)}

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. ↩

sokra · 2026-01-16T09:41:15Z

Merge activity

Jan 16, 9:41 AM UTC: @sokra merged this pull request with Graphite.

### What? Use strongly consistent reads for compute_async_module_info to avoid double execution.

nextjs-bot added created-by: Turbopack team PRs by the Turbopack team. Turbopack Related to Turbopack with Next.js. labels Jan 12, 2026

This was referenced Jan 12, 2026

read task cell should only need Data #88339

Draft

Turbopack: follow tracing spans through aggregation update queue #88410

Merged

Turbopack: avoid chunk_item_id task and use selective cell access instead #88411

Merged

sokra force-pushed the sokra/module-graph-consistency branch from 965d41d to f872016 Compare January 13, 2026 15:43

sokra force-pushed the sokra/compute-async-module-info-consistency branch from 2187e6b to dfa89fe Compare January 13, 2026 15:43

sokra mentioned this pull request Jan 13, 2026

Turbopack: refactor data storage to avoid reverse task cache #88492

Merged

sokra force-pushed the sokra/compute-async-module-info-consistency branch from dfa89fe to 979bcab Compare January 13, 2026 16:40

sokra force-pushed the sokra/module-graph-consistency branch from f872016 to 7f4e685 Compare January 13, 2026 16:40

sokra marked this pull request as ready for review January 13, 2026 16:40

sokra changed the title ~~Consistency for compute_async_module_info~~ Turbopack: Consistency for compute_async_module_info Jan 13, 2026

sokra force-pushed the sokra/module-graph-consistency branch from 7f4e685 to a70d6f0 Compare January 13, 2026 20:25

sokra force-pushed the sokra/compute-async-module-info-consistency branch from 979bcab to 3d7469a Compare January 13, 2026 20:25

This was referenced Jan 14, 2026

Turbopack: use selective reads for merged modules #88560

Merged

Turbopack: add caching to chunking #88561

Merged

naveenkarmegam approved these changes Jan 15, 2026

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sokra force-pushed the sokra/module-graph-consistency branch from cc11d10 to d8ab648 Compare January 15, 2026 07:59

sokra force-pushed the sokra/compute-async-module-info-consistency branch from 164804e to 55a43d8 Compare January 15, 2026 07:59

sokra force-pushed the sokra/module-graph-consistency branch from d8ab648 to b53ac2f Compare January 15, 2026 10:51

sokra force-pushed the sokra/compute-async-module-info-consistency branch from 55a43d8 to 5ca3a00 Compare January 15, 2026 10:51

sokra force-pushed the sokra/module-graph-consistency branch from b53ac2f to bf897af Compare January 15, 2026 18:37

sokra force-pushed the sokra/compute-async-module-info-consistency branch from 5ca3a00 to 5dc9d8d Compare January 15, 2026 18:37

sokra force-pushed the sokra/module-graph-consistency branch from bf897af to cea0b88 Compare January 15, 2026 19:19

sokra force-pushed the sokra/compute-async-module-info-consistency branch from 5dc9d8d to d431fb8 Compare January 15, 2026 19:20

sokra force-pushed the sokra/module-graph-consistency branch 3 times, most recently from 92471c6 to e21693e Compare January 16, 2026 05:45

sokra force-pushed the sokra/compute-async-module-info-consistency branch from d431fb8 to c81e9bb Compare January 16, 2026 05:45

sokra force-pushed the sokra/module-graph-consistency branch from e21693e to ab71fe2 Compare January 16, 2026 05:45

sokra force-pushed the sokra/compute-async-module-info-consistency branch 2 times, most recently from 6a80439 to d990cb8 Compare January 16, 2026 07:03

sokra force-pushed the sokra/module-graph-consistency branch from ab71fe2 to 236485f Compare January 16, 2026 07:03

sokra changed the base branch from sokra/module-graph-consistency to graphite-base/88409 January 16, 2026 08:59

Consistency for compute_async_module_info

29ea463

sokra force-pushed the sokra/compute-async-module-info-consistency branch from d990cb8 to d02817b Compare January 16, 2026 08:59

sokra force-pushed the graphite-base/88409 branch from 236485f to cfe29f9 Compare January 16, 2026 08:59

graphite-app bot changed the base branch from graphite-base/88409 to canary January 16, 2026 09:00

clippy

bf2f79f

sokra force-pushed the sokra/compute-async-module-info-consistency branch from d02817b to bf2f79f Compare January 16, 2026 09:00

sokra merged commit 22fb1a0 into canary Jan 16, 2026
164 checks passed

sokra deleted the sokra/compute-async-module-info-consistency branch January 16, 2026 09:41

wyattjoh pushed a commit that referenced this pull request Jan 16, 2026

Turbopack: Consistency for compute_async_module_info (#88409)

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### What? Use strongly consistent reads for compute_async_module_info to avoid double execution.

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