refactor(core): reuse existing leaf chunk graphs

[LingyuCoder]

Summary

• Extend the incremental chunk graph fast path to terminal modules that already exist in the recovered graph.
• Preserve conservative fallback behavior when a leaf is new or topology changes.
• Cover terminal edits, duplicate roots, pre-order indices, and affected-module recovery.

Related links

Source PR: #14772

Closes #14768

Checklist

• Tests updated (or not required).
• Documentation updated (or not required).

[github-actions]

📝 Benchmark detail: Open

Name	Base (25274d8)	Current	Change
10000_big_production-mode_disable-minimize + exec	12.1 s ± 334 ms	12.1 s ± 273 ms	+0.12 %
10000_development-mode + exec	895 ms ± 19 ms	885 ms ± 24 ms	-1.12 %
10000_development-mode_hmr + stats	162 ms ± 18 ms	155 ms ± 8.9 ms	-4.40 %
10000_development-mode_noop-loader + exec	1.78 s ± 135 ms	1.73 s ± 24 ms	-2.83 %
10000_production-mode + exec	1.02 s ± 32 ms	1.04 s ± 157 ms	+1.17 %
10000_production-mode_persistent-cold + exec	1.21 s ± 38 ms	1.17 s ± 42 ms	-3.25 %
10000_production-mode_persistent-hot + exec	634 ms ± 12 ms	632 ms ± 25 ms	-0.44 %
10000_production-mode_source-map + exec	1.21 s ± 97 ms	1.17 s ± 29 ms	-3.17 %
arco-pro_development-mode + exec	1.25 s ± 40 ms	1.29 s ± 98 ms	+2.94 %
arco-pro_development-mode_hmr + stats	33 ms ± 1.3 ms	33 ms ± 0.82 ms	-0.71 %
arco-pro_production-mode + exec	2.34 s ± 154 ms	2.31 s ± 81 ms	-1.03 %
arco-pro_production-mode_generate-package-json-webpack-plugin + exec	2.42 s ± 84 ms	2.4 s ± 69 ms	-0.72 %
arco-pro_production-mode_persistent-cold + exec	2.4 s ± 129 ms	2.35 s ± 67 ms	-2.03 %
arco-pro_production-mode_persistent-hot + exec	344 ms ± 9 ms	344 ms ± 6.7 ms	+0.12 %
arco-pro_production-mode_source-map + exec	2.84 s ± 68 ms	2.74 s ± 38 ms	-3.74 %
arco-pro_production-mode_source-map_persistent-cold + exec	2.95 s ± 129 ms	2.86 s ± 99 ms	-2.82 %
arco-pro_production-mode_source-map_persistent-hot + exec	477 ms ± 7.1 ms	476 ms ± 8.1 ms	-0.34 %
arco-pro_production-mode_traverse-chunk-modules + exec	2.37 s ± 143 ms	2.37 s ± 91 ms	-0.18 %
bundled-threejs_development-mode + exec	181 ms ± 2.9 ms	178 ms ± 6.8 ms	-1.55 %
bundled-threejs_production-mode + exec	208 ms ± 5.7 ms	211 ms ± 8.7 ms	+1.34 %
large-dyn-imports_development-mode + exec	1.17 s ± 31 ms	1.18 s ± 51 ms	+1.20 %
large-dyn-imports_production-mode + exec	1.27 s ± 30 ms	1.26 s ± 25 ms	-0.60 %
threejs_development-mode_10x + exec	775 ms ± 13 ms	777 ms ± 6.4 ms	+0.26 %
threejs_development-mode_10x_hmr + stats	112 ms ± 2.7 ms	112 ms ± 14 ms	-0.68 %
threejs_production-mode_10x + exec	2.86 s ± 136 ms	2.79 s ± 33 ms	-2.27 %
threejs_production-mode_10x_persistent-cold + exec	2.95 s ± 26 ms	2.92 s ± 29 ms	-1.22 %
threejs_production-mode_10x_persistent-hot + exec	380 ms ± 7.9 ms	377 ms ± 9.3 ms	-0.68 %
threejs_production-mode_10x_source-map + exec	3.66 s ± 179 ms	3.58 s ± 33 ms	-2.24 %
10000_big_production-mode_disable-minimize + rss memory	2179 MiB ± 83.1 MiB	2193 MiB ± 40.7 MiB	+0.68 %
10000_development-mode + rss memory	538 MiB ± 14 MiB	543 MiB ± 4.11 MiB	+0.96 %
10000_development-mode_hmr + rss memory	788 MiB ± 40.7 MiB	776 MiB ± 30.8 MiB	-1.41 %
10000_development-mode_noop-loader + rss memory	805 MiB ± 11.9 MiB	808 MiB ± 12 MiB	+0.38 %
10000_production-mode + rss memory	466 MiB ± 9.03 MiB	461 MiB ± 27.6 MiB	-1.09 %
10000_production-mode_persistent-cold + rss memory	662 MiB ± 11.1 MiB	666 MiB ± 15.4 MiB	+0.59 %
10000_production-mode_persistent-hot + rss memory	649 MiB ± 33.8 MiB	664 MiB ± 34.5 MiB	+2.39 %
10000_production-mode_source-map + rss memory	483 MiB ± 32.9 MiB	474 MiB ± 8.06 MiB	-1.96 %
arco-pro_development-mode + rss memory	399 MiB ± 2.04 MiB	403 MiB ± 5.49 MiB	+1.01 %
arco-pro_development-mode_hmr + rss memory	422 MiB ± 8.17 MiB	423 MiB ± 2.68 MiB	+0.23 %
arco-pro_production-mode + rss memory	574 MiB ± 12.9 MiB	577 MiB ± 10.1 MiB	+0.49 %
arco-pro_production-mode_generate-package-json-webpack-plugin + rss memory	588 MiB ± 8.89 MiB	592 MiB ± 6.28 MiB	+0.67 %
arco-pro_production-mode_persistent-cold + rss memory	660 MiB ± 26.3 MiB	659 MiB ± 8.98 MiB	-0.04 %
arco-pro_production-mode_persistent-hot + rss memory	293 MiB ± 9.15 MiB	294 MiB ± 11.1 MiB	+0.37 %
arco-pro_production-mode_source-map + rss memory	682 MiB ± 11.2 MiB	686 MiB ± 19.3 MiB	+0.52 %
arco-pro_production-mode_source-map_persistent-cold + rss memory	812 MiB ± 37.6 MiB	810 MiB ± 31.1 MiB	-0.14 %
arco-pro_production-mode_source-map_persistent-hot + rss memory	413 MiB ± 12.3 MiB	421 MiB ± 15.1 MiB	+2.09 %
arco-pro_production-mode_traverse-chunk-modules + rss memory	579 MiB ± 11.1 MiB	581 MiB ± 19.8 MiB	+0.34 %
bundled-threejs_development-mode + rss memory	126 MiB ± 3.29 MiB	126 MiB ± 8.51 MiB	-0.13 %
bundled-threejs_production-mode + rss memory	137 MiB ± 2.18 MiB	139 MiB ± 4.56 MiB	+1.64 %
large-dyn-imports_development-mode + rss memory	553 MiB ± 20.4 MiB	551 MiB ± 12.9 MiB	-0.40 %
large-dyn-imports_production-mode + rss memory	406 MiB ± 1.63 MiB	406 MiB ± 7.16 MiB	+0.13 %
threejs_development-mode_10x + rss memory	432 MiB ± 9.74 MiB	439 MiB ± 19.2 MiB	+1.56 %
threejs_development-mode_10x_hmr + rss memory	592 MiB ± 10.9 MiB	605 MiB ± 32 MiB	+2.17 %
threejs_production-mode_10x + rss memory	615 MiB ± 22.8 MiB	621 MiB ± 20.8 MiB	+0.94 %
threejs_production-mode_10x_persistent-cold + rss memory	576 MiB ± 12 MiB	571 MiB ± 10.8 MiB	-0.96 %
threejs_production-mode_10x_persistent-hot + rss memory	378 MiB ± 7.36 MiB	371 MiB ± 10.9 MiB	-1.89 %
threejs_production-mode_10x_source-map + rss memory	738 MiB ± 26.3 MiB	732 MiB ± 38 MiB	-0.82 %

Base persistent cache hit rate: 👍

Current persistent cache hit rate: 👍

[github-actions]

📦 Binary Size-limit

Comparing c360985 to perf(core): reuse stable async chunk graphs by harpsealjs

⏳ The base commit triggered a linux binding build, but its binary size data has not been generated yet, so the size comparison is skipped.

Please re-run this workflow once the ecosystem-benchmark data for that commit is published.

Warning

Reference only — not the real baseline. The base commit's data isn't ready yet, so this compares against the nearest earlier commit that has data (25274d8) for a rough estimate:

❌ Size increased by 36.00KB from 66.59MB to 66.63MB (⬆️0.05%)

[github-actions]

Rsdoctor Bundle Diff Analysis

Found 5 projects in monorepo, 5 projects with changes.

📊 Quick Summary

Project	Total Size	Gzip Size	Change	Gzip Change
popular-libs	1.7 MB	552.1 KB	-	-
react-10k	5.6 MB	1.3 MB	-	-
react-1k	823.1 KB	217.0 KB	-	-
react-5k	2.7 MB	663.8 KB	-	-
ui-components	4.9 MB	1.4 MB	-	-

📋 Detailed Reports (Click to expand)

📁 popular-libs

Path: ../build-tools-performance/cases/popular-libs/dist/rsdoctor-data.json

⚠️ No baseline data found - Unable to perform comparison analysis

Metric	Current	Baseline	Change
📊 Total Size	1.7 MB	-	-
🗜️ Gzip Size	552.1 KB	-	-
📄 JavaScript	1.7 MB	-	-
🎨 CSS	0 B	-	-
🌐 HTML	289.0 B	-	-
📁 Other Assets	0 B	-	-

📁 react-10k

Path: ../build-tools-performance/cases/react-10k/dist/rsdoctor-data.json

⚠️ No baseline data found - Unable to perform comparison analysis

Metric	Current	Baseline	Change
📊 Total Size	5.6 MB	-	-
🗜️ Gzip Size	1.3 MB	-	-
📄 JavaScript	5.6 MB	-	-
🎨 CSS	21.0 B	-	-
🌐 HTML	328.0 B	-	-
📁 Other Assets	0 B	-	-

📁 react-1k

Path: ../build-tools-performance/cases/react-1k/dist/rsdoctor-data.json

⚠️ No baseline data found - Unable to perform comparison analysis

Metric	Current	Baseline	Change
📊 Total Size	823.1 KB	-	-
🗜️ Gzip Size	217.0 KB	-	-
📄 JavaScript	822.7 KB	-	-
🎨 CSS	0 B	-	-
🌐 HTML	328.0 B	-	-
📁 Other Assets	0 B	-	-

📁 react-5k

Path: ../build-tools-performance/cases/react-5k/dist/rsdoctor-data.json

⚠️ No baseline data found - Unable to perform comparison analysis

Metric	Current	Baseline	Change
📊 Total Size	2.7 MB	-	-
🗜️ Gzip Size	663.8 KB	-	-
📄 JavaScript	2.7 MB	-	-
🎨 CSS	21.0 B	-	-
🌐 HTML	328.0 B	-	-
📁 Other Assets	0 B	-	-

📁 ui-components

Path: ../build-tools-performance/cases/ui-components/dist/rsdoctor-data.json

⚠️ No baseline data found - Unable to perform comparison analysis

Metric	Current	Baseline	Change
📊 Total Size	4.9 MB	-	-
🗜️ Gzip Size	1.4 MB	-	-
📄 JavaScript	4.8 MB	-	-
🎨 CSS	112.1 KB	-	-
🌐 HTML	328.0 B	-	-
📁 Other Assets	0 B	-	-

Generated by Rsdoctor GitHub Action

[codspeed-hq]

Merging this PR will improve performance by 2.98%

⚠️ Different runtime environments detected

Some benchmarks with significant performance changes were compared across different runtime environments,
which may affect the accuracy of the results.

Open the report in CodSpeed to investigate

⚡ 1 improved benchmark
✅ 42 untouched benchmarks
⏩ 47 skipped benchmarks¹

Performance Changes

	Mode	Benchmark	BASE	HEAD	Efficiency
⚡	Simulation	rust@create_chunk_assets	1.5 ms	1.4 ms	+2.98%

Tip

Curious why this is faster? Comment @codspeedbot explain why this is faster on this PR, or directly use the CodSpeed MCP with your agent.

---

_{Comparing seal/hmr-existing-leaf-14768 (c360985) with seal/hmr-async-outgoings-14769 (df09b48)}

Footnotes

1. 47 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. ↩