Turbopack: report changed env vars in tracing by sokra · Pull Request #88195 · vercel/next.js

sokra · 2026-01-07T08:00:45Z

What?

Add a list of changed defined env vars to the trace file

sokra · 2026-01-07T08:01:09Z

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nextjs-bot · 2026-01-07T08:01:12Z

Allow CI Workflow Run

approve CI run for commit: 5661e21

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

nextjs-bot · 2026-01-07T08:01:12Z

Allow CI Workflow Run

approve CI run for commit: 5661e21

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

crates/next-api/src/project.rs

nextjs-bot · 2026-01-07T08:29:48Z

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 (First Request)	1.185s	1.164s	✓	█▇█▁█
Warm (Listen)	455ms	456ms	✓	▁██▁█
Warm (First Request)	355ms	340ms	✓	▁▁█▂▁

📦 Dev Server (Webpack) (Legacy)

📦 Dev Server (Webpack)

Metric	Canary	PR	Change	Trend
Cold (Listen)	456ms	456ms	✓	▁▁▁█▅
Cold (First Request)	1.848s	1.843s	✓	▁▁▁█▃
Warm (Listen)	455ms	456ms	✓	▁▁▁█▄
Warm (First Request)	1.851s	1.850s	✓	▁▁▁█▅

⚡ Production Builds

Metric	Canary	PR	Change	Trend
Fresh Build	4.114s	4.067s	✓	▃▁▃█▂
Cached Build	4.069s	4.085s	✓	▂▂▁█▁

📦 Production Builds (Webpack) (Legacy)

📦 Production Builds (Webpack)

Metric	Canary	PR	Change	Trend
Fresh Build	14.029s	14.085s	✓	▁▁▁█▄
Cached Build	14.170s	14.064s	✓	▁▁▁█▄
node_modules Size	457 MB	457 MB	✓	▁▁▁▁▁

📦 Bundle Sizes

Bundle Sizes

⚡ Turbopack

Client

Main Bundles: **430 kB** → **430 kB** ✅ -3 B

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

Server

Middleware

	Canary	PR	Change
middleware-b..fest.js gzip	787 B	785 B	✓
Total	787 B	785 B	✅ -2 B

Build Details

Build Manifests

	Canary	PR	Change
_buildManifest.js gzip	448 B	451 B	✓
Total	448 B	451 B	⚠️ +3 B

📦 Webpack

Client

Main Bundles

	Canary	PR	Change
2086.HASH.js gzip	169 B	N/A	-
2161-HASH.js gzip	5.4 kB	N/A	-
2747-HASH.js gzip	4.48 kB	N/A	-
4322-HASH.js gzip	52.5 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	38.4 kB	38.8 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	52.2 kB	-
6349-HASH.js gzip	N/A	4.46 kB	-
7019-HASH.js gzip	N/A	5.42 kB	-
b17a3386-HASH.js gzip	N/A	62.3 kB	-
Total	225 kB	225 kB	⚠️ +128 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	124 kB	124 kB	✓
page.js gzip	240 kB	240 kB	✓
Total	364 kB	365 kB	⚠️ +728 B

Middleware

	Canary	PR	Change
middleware-b..fest.js gzip	654 B	654 B	✓
middleware-r..fest.js gzip	155 B	156 B	✓
middleware.js gzip	32.6 kB	33 kB	🔴 +389 B (+1%)
edge-runtime..pack.js gzip	842 B	842 B	✓
Total	34.2 kB	34.6 kB	⚠️ +390 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	3.62 MB	3.63 MB	🔴 +3.89 kB (+0%)
index.pack gzip	99.1 kB	98.7 kB	✓
index.pack.old gzip	98.9 kB	99.3 kB	✓
Total	3.82 MB	3.82 MB	⚠️ +3.8 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	302 kB	302 kB	✓
app-page-tur..prod.js gzip	158 kB	158 kB	✓
app-page-tur...dev.js gzip	299 kB	299 kB	✓
app-page-tur..prod.js gzip	156 kB	156 kB	✓
app-page.run...dev.js gzip	299 kB	299 kB	✓
app-page.run..prod.js gzip	156 kB	156 kB	✓
app-route-ex...dev.js gzip	68.7 kB	68.7 kB	✓
app-route-ex..prod.js gzip	47.5 kB	47.5 kB	✓
app-route-tu...dev.js gzip	68.7 kB	68.7 kB	✓
app-route-tu..prod.js gzip	47.5 kB	47.5 kB	✓
app-route-tu...dev.js gzip	68.3 kB	68.3 kB	✓
app-route-tu..prod.js gzip	47.3 kB	47.3 kB	✓
app-route.ru...dev.js gzip	68.3 kB	68.3 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	41.1 kB	41.1 kB	✓
pages-api-tu..prod.js gzip	31.2 kB	31.2 kB	✓
pages-api.ru...dev.js gzip	41 kB	41 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	2.68 MB	2.68 MB	✅ -1 B

codspeed-hq · 2026-01-07T12:09:07Z

Merging this PR will not alter performance

Summary

✅ 17 untouched benchmarks
⏩ 3 skipped benchmarks¹

_{Comparing sokra/trace_env_diff (4244c77) with canary (6805af4)}

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 · 2026-01-07T13:22:58Z

Tests Passed

nextjs-bot added created-by: Turbopack team PRs by the Turbopack team. Turbopack Related to Turbopack with Next.js. labels Jan 7, 2026

This was referenced Jan 7, 2026

Turbopack: make GraphTraversal deterministically calling all nodes before erroring #88119

Merged

Turbopack: remove Stateful flag #88196

Merged

This was referenced Jan 7, 2026

Turbopack: parallelize making dependent tasks dirty #86755

Merged

Turbopack: Use batch get request to read more efficient from database #87106

Merged

Turbopack: In CI only persist at the end #87316

Merged

vercel bot reviewed Jan 7, 2026

View reviewed changes

crates/next-api/src/project.rs Show resolved Hide resolved

sokra requested a review from mischnic January 7, 2026 08:17

sokra marked this pull request as ready for review January 7, 2026 08:17

mischnic approved these changes Jan 7, 2026

View reviewed changes

sokra force-pushed the sokra/aggregation-update-count branch 2 times, most recently from 96e3bbe to fcd50f2 Compare January 7, 2026 11:44

sokra force-pushed the sokra/trace_env_diff branch from 5661e21 to dc67461 Compare January 7, 2026 11:44

sokra changed the base branch from sokra/aggregation-update-count to graphite-base/88195 January 7, 2026 13:11

sokra force-pushed the graphite-base/88195 branch from fcd50f2 to bf30cd5 Compare January 7, 2026 13:12

sokra force-pushed the sokra/trace_env_diff branch from dc67461 to d36032d Compare January 7, 2026 13:12

graphite-app bot changed the base branch from graphite-base/88195 to canary January 7, 2026 13:12

sokra force-pushed the sokra/trace_env_diff branch from d36032d to 42acf15 Compare January 7, 2026 13:12

sokra added 2 commits January 7, 2026 15:28

Turbopack: report changed env vars in tracing

faddee9

clippy

4244c77

sokra force-pushed the sokra/trace_env_diff branch from 42acf15 to 4244c77 Compare January 7, 2026 14:29

sokra merged commit 117c33b into canary Jan 7, 2026
166 of 167 checks passed

sokra deleted the sokra/trace_env_diff branch January 7, 2026 15:33

github-actions bot added the locked label Jan 22, 2026

github-actions bot locked as resolved and limited conversation to collaborators Jan 22, 2026

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Turbopack: report changed env vars in tracing#88195

Turbopack: report changed env vars in tracing#88195
sokra merged 2 commits intocanaryfrom
sokra/trace_env_diff

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⚡ Dev Server

📦 Dev Server (Webpack)

⚡ Production Builds

📦 Production Builds (Webpack)

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⚡ Turbopack

📦 Webpack

🔄 Shared (bundler-independent)

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Stats from current PR

✅ No significant changes detected

⚡ Dev Server

📦 Dev Server (Webpack)

⚡ Production Builds

📦 Production Builds (Webpack)

Bundle Sizes

⚡ Turbopack

📦 Webpack

🔄 Shared (bundler-independent)

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Merging this PR will not alter performance

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