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bench: render-pipeline benchmarks and stress routes (2/8)#89863

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feedthejim/node-stream-01b-bench
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bench: render-pipeline benchmarks and stress routes (2/8)#89863
timneutkens merged 4 commits intocanaryfrom
feedthejim/node-stream-01b-bench

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@feedthejim feedthejim commented Feb 11, 2026 •
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Summary

Benchmark infrastructure for measuring render pipeline performance.

  • render-pipeline benchmark (bench/render-pipeline/): benchmark.ts for profiling render paths, analyze-profiles.ts for CPU profile analysis
  • Stress routes (bench/basic-app/app/streaming/): light, medium, heavy, bulk, wide, chunkstorm variants for different streaming load profiles
  • Basic app harness: benchmark.sh runner script, next.config.js
  • Minimal server: bench/next-minimal-server/bin/minimal-server.js
  • Docs: bench/BENCHMARKING.md guide
  • Config: eslint exclusion for bench paths, package.json bench scripts

Test plan

  • No runtime behavior changes
  • Benchmark scripts are standalone tooling

@nextjs-bot nextjs-bot added created-by: Next.js team PRs by the Next.js team. tests labels Feb 11, 2026
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feedthejim commented Feb 11, 2026 •
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@feedthejim feedthejim force-pushed the feedthejim/node-stream-01b-bench branch from 4803d02 to b05d013 Compare February 11, 2026 22:34
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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) 440ms 439ms ✓ ▁▂▂▂▁
Cold (First Request) 1.273s 1.270s ✓ ▄▅▄▃▄
Warm (Listen) 456ms 457ms ✓ ▁▁▁▁▁
Warm (Ready in log) 444ms 448ms ✓ ▁▁▁▂▁
Warm (First Request) 346ms 352ms ✓ ▂▂▁▃▁
📦 Dev Server (Webpack) (Legacy)

📦 Dev Server (Webpack)

Metric Canary PR Change Trend
Cold (Listen) 456ms 456ms ✓ ▁▁▁▁█
Cold (Ready in log) 452ms 453ms ✓ ▃▂▃▂▅
Cold (First Request) 2.063s 2.064s ✓ ▂▃▂▃█
Warm (Listen) 456ms 456ms ✓ ▁▁▁▁█
Warm (Ready in log) 453ms 449ms ✓ ▅▄▄▄█
Warm (First Request) 2.063s 2.062s ✓ ▂▂▂▃▇

⚡ Production Builds

Metric Canary PR Change Trend
Fresh Build 3.912s 3.908s ✓ ▁▁▁▄▁
Cached Build 3.945s 3.925s ✓ ▁▁▁▄▁
📦 Production Builds (Webpack) (Legacy)

📦 Production Builds (Webpack)

Metric Canary PR Change Trend
Fresh Build 14.902s 14.844s ✓ ▁▂▁▁▇
Cached Build 14.909s 14.927s ✓ ▁▂▁▂▇
node_modules Size 472 MB 472 MB ✓ ▁████
📦 Bundle Sizes

Bundle Sizes

⚡ Turbopack

Client

Main Bundles: **397 kB** → **397 kB** ⚠️ +13 B

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

Server

Middleware
Canary PR Change
middleware-b..fest.js gzip 757 B 763 B ✓
Total 757 B 763 B ⚠️ +6 B
Build Details
Build Manifests
Canary PR Change
_buildManifest.js gzip 452 B 449 B ✓
Total 452 B 449 B ✅ -3 B

📦 Webpack

Client

Main Bundles
Canary PR Change
5528-HASH.js gzip 5.47 kB N/A -
6280-HASH.js gzip 57.1 kB N/A -
6335.HASH.js gzip 169 B N/A -
912-HASH.js gzip 4.53 kB N/A -
e8aec2e4-HASH.js gzip 62.6 kB N/A -
framework-HASH.js gzip 59.7 kB 59.7 kB ✓
main-app-HASH.js gzip 256 B 253 B 🟢 3 B (-1%)
main-HASH.js gzip 39.1 kB 39.1 kB ✓
webpack-HASH.js gzip 1.68 kB 1.68 kB ✓
262-HASH.js gzip N/A 4.53 kB -
2889.HASH.js gzip N/A 169 B -
5602-HASH.js gzip N/A 5.48 kB -
6948ada0-HASH.js gzip N/A 62.6 kB -
9544-HASH.js gzip N/A 57.7 kB -
Total 231 kB 231 kB ⚠️ +639 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 2.5 kB 2.5 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 7.97 kB 7.97 kB ✅ -2 B

Server

Edge SSR
Canary PR Change
edge-ssr.js gzip 126 kB 125 kB ✓
page.js gzip 249 kB 249 kB ✓
Total 374 kB 375 kB ⚠️ +390 B
Middleware
Canary PR Change
middleware-b..fest.js gzip 615 B 615 B ✓
middleware-r..fest.js gzip 156 B 155 B ✓
middleware.js gzip 43.6 kB 43.8 kB ✓
edge-runtime..pack.js gzip 842 B 842 B ✓
Total 45.2 kB 45.4 kB ⚠️ +147 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 3.87 MB 3.87 MB ✓
index.pack gzip 105 kB 104 kB 🟢 1.36 kB (-1%)
index.pack.old gzip 104 kB 103 kB 🟢 1.23 kB (-1%)
Total 4.08 MB 4.08 MB ⚠️ +1.14 kB

🔄 Shared (bundler-independent)

Runtimes
Canary PR Change
app-page-exp...dev.js gzip 316 kB 316 kB ✓
app-page-exp..prod.js gzip 167 kB 167 kB ✓
app-page-tur...dev.js gzip 315 kB 315 kB ✓
app-page-tur..prod.js gzip 167 kB 167 kB ✓
app-page-tur...dev.js gzip 312 kB 312 kB ✓
app-page-tur..prod.js gzip 165 kB 165 kB ✓
app-page.run...dev.js gzip 312 kB 312 kB ✓
app-page.run..prod.js gzip 165 kB 165 kB ✓
app-route-ex...dev.js gzip 70.5 kB 70.5 kB ✓
app-route-ex..prod.js gzip 49 kB 49 kB ✓
app-route-tu...dev.js gzip 70.5 kB 70.5 kB ✓
app-route-tu..prod.js gzip 49 kB 49 kB ✓
app-route-tu...dev.js gzip 70.1 kB 70.1 kB ✓
app-route-tu..prod.js gzip 48.8 kB 48.8 kB ✓
app-route.ru...dev.js gzip 70.1 kB 70.1 kB ✓
app-route.ru..prod.js gzip 48.7 kB 48.7 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 43.2 kB 43.2 kB ✓
pages-api-tu..prod.js gzip 32.9 kB 32.9 kB ✓
pages-api.ru...dev.js gzip 43.2 kB 43.2 kB ✓
pages-api.ru..prod.js gzip 32.8 kB 32.8 kB ✓
pages-turbo....dev.js gzip 52.5 kB 52.5 kB ✓
pages-turbo...prod.js gzip 38.4 kB 38.4 kB ✓
pages.runtim...dev.js gzip 52.5 kB 52.5 kB ✓
pages.runtim..prod.js gzip 38.4 kB 38.4 kB ✓
server.runti..prod.js gzip 63.5 kB 63.5 kB ✓
Total 2.8 MB 2.8 MB ✅ -2 B

@feedthejim feedthejim changed the title bench: render-pipeline benchmarks and stress routes (2/8) bench: render-pipeline benchmarks and stress routes Feb 12, 2026
@feedthejim feedthejim changed the title (2/8) bench: render-pipeline benchmarks and stress routes bench: render-pipeline benchmarks and stress routes (2/8) Feb 12, 2026
@timneutkens timneutkens mentioned this pull request Feb 13, 2026
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@timneutkens timneutkens force-pushed the feedthejim/node-stream-01b-bench branch from b05d013 to 73b30b4 Compare February 16, 2026 14:59
@timneutkens timneutkens force-pushed the feedthejim/node-stream-01b-bench branch from 73b30b4 to dac7602 Compare February 16, 2026 16:50
@timneutkens timneutkens force-pushed the feedthejim/node-stream-01-docs-bench branch from c4812f3 to 2a1a5cd Compare February 16, 2026 16:50
@timneutkens timneutkens marked this pull request as ready for review February 16, 2026 16:51
Base automatically changed from feedthejim/node-stream-01-docs-bench to canary February 16, 2026 17:32
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nextjs-bot commented Feb 16, 2026 •
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Tests Passed

@timneutkens timneutkens merged commit 663c915 into canary Feb 17, 2026
286 of 288 checks passed
@timneutkens timneutkens deleted the feedthejim/node-stream-01b-bench branch February 17, 2026 08:40
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