feat!: remove experiments.layers

[LingyuCoder]

Summary

Layer is a feature for organizing modules into different layers, which can be useful in advanced scenarios such as React Server Components. By assigning different layers to modules, you can gain finer control over their build behavior, for example:

• Compiling modules in different layers for different target environments
• Outputting them to separate build directories

Starting from Rspack 1.6, the layer feature has become stable enough that the experimental flag experiments.layers has been deprecated. You can now use the layer feature directly without the experimental flag.

Related links

Checklist

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

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[github-actions]

Rsdoctor Bundle Diff Analysis

Found 5 projects in monorepo, 3 projects with changes.

📊 Quick Summary

Project	Total Size	Change
react-10k	5.7 MB	-8.0 B (-0.0%)
react-1k	825.4 KB	0
react-5k	2.7 MB	+1.0 B (0.0%)
rome	986.0 KB	+1.7 KB (0.2%)
ui-components	2.1 MB	0

📋 Detailed Reports (Click to expand)

📁 react-10k

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

📌 Baseline Commit: 0ddce9d224 | PR: #12716

Metric	Current	Baseline	Change
📊 Total Size	5.7 MB	5.7 MB	-8.0 B (-0.0%)
📄 JavaScript	5.7 MB	5.7 MB	-8.0 B (-0.0%)
🎨 CSS	21.0 B	21.0 B	0
🌐 HTML	0 B	0 B	0
📁 Other Assets	0 B	0 B	0

📦 Download Diff Report: react-10k Bundle Diff

📁 react-5k

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

📌 Baseline Commit: 0ddce9d224 | PR: #12716

Metric	Current	Baseline	Change
📊 Total Size	2.7 MB	2.7 MB	+1.0 B (0.0%)
📄 JavaScript	2.7 MB	2.7 MB	+1.0 B (0.0%)
🎨 CSS	21.0 B	21.0 B	0
🌐 HTML	0 B	0 B	0
📁 Other Assets	0 B	0 B	0

📦 Download Diff Report: react-5k Bundle Diff

📁 rome

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

📌 Baseline Commit: 0ddce9d224 | PR: #12716

Metric	Current	Baseline	Change
📊 Total Size	986.0 KB	984.3 KB	+1.7 KB (0.2%)
📄 JavaScript	986.0 KB	984.3 KB	+1.7 KB (0.2%)
🎨 CSS	0 B	0 B	0
🌐 HTML	0 B	0 B	0
📁 Other Assets	0 B	0 B	0

📦 Download Diff Report: rome Bundle Diff

Generated by Rsdoctor GitHub Action

[codspeed-hq]

Merging this PR will not alter performance

✅ 16 untouched benchmarks
⏩ 1 skipped benchmark¹

---

_{Comparing feat/remove-experiment-layers (4cb74ad) with v2 (b0c7f30)²}

Footnotes

1. 1 benchmark was skipped, so the baseline result was used instead. If it was deleted from the codebase, click here and archive it to remove it from the performance reports. ↩

2. No successful run was found on v2 (a6515f9) during the generation of this report, so b0c7f30 was used instead as the comparison base. There might be some changes unrelated to this pull request in this report. ↩

[github-actions]

📦 Binary Size-limit

Comparing 4cb74ad to chore(deps): update patch crates (#12716) by renovate[bot]

🎉 Size decreased by 386.63KB from 47.90MB to 47.53MB (⬇️0.79%)