test(benchmark): add compilation stage benchmark cases

[LingyuCoder]

Summary

Add stage-isolated Rust CodSpeed benchmark cases in xtask/benchmark/benches/groups/compilation_stages.rs for:

• rust@mangle_exports
• rust@runtime_requirements
• rust@create_full_hash
• rust@create_chunk_assets
• rust@create_module_assets
• rust@real_content_hash

This also adds the benchmark-local setup/reset helpers needed to keep those stages isolated without changing rspack_core public visibility.

Related links

• N/A

Validation

• cargo check -p rspack_benchmark --bench benches
• cargo fmt --all --check

Known limitations

• Some of the new benches use benchmark-local mirrors of private compilation pass logic to avoid widening rspack_core API visibility.
• The runtime_requirements and create_chunk_assets benches may still differ from the exact production execution model in scheduling/parallelism overhead, so they should be treated as draft until that fidelity is reviewed.

Checklist

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

[github-actions]

📦 Binary Size-limit

Comparing eb0197d to chore(release): release 2.0.0-rc.2 (#13697) by harpsealjs

🎉 Size decreased by 6.97KB from 49.39MB to 49.38MB (⬇️0.01%)

[github-actions]

Rsdoctor Bundle Diff Analysis

⚠️ Note: The latest commit (b8cba8dcd7) does not have baseline artifacts. Using commit fff3f0f9b8 for baseline comparison instead. If this seems incorrect, please wait a few minutes and try rerunning the workflow.

Found 6 projects in monorepo, 0 projects with changes.

📊 Quick Summary

Project	Total Size	Change
popular-libs	1.7 MB	0
react-10k	5.7 MB	0
react-1k	826.2 KB	0
react-5k	2.7 MB	0
rome	984.1 KB	0
ui-components	5.0 MB	0

Generated by Rsdoctor GitHub Action

[codspeed-hq]

Merging this PR will degrade performance by 2.3%

⚡ 1 improved benchmark
❌ 2 regressed benchmarks
✅ 25 untouched benchmarks
🆕 6 new benchmarks

⚠️ Please fix the performance issues or acknowledge them on CodSpeed.

Performance Changes

	Mode	Benchmark	BASE	HEAD	Efficiency
🆕	Simulation	rust@mangle_exports	N/A	11.8 ms	N/A
⚡	Simulation	rust@create_chunk_ids	10.5 ms	10.2 ms	+2.92%
❌	Simulation	rust@concatenate_module_code_generation	138.1 ms	139.9 ms	-1.34%
🆕	Simulation	rust@real_content_hash	N/A	34.5 ms	N/A
🆕	Simulation	rust@create_chunk_assets	N/A	3.9 ms	N/A
🆕	Simulation	rust@runtime_requirements	N/A	57.4 ms	N/A
🆕	Simulation	rust@create_module_assets	N/A	798.2 µs	N/A
🆕	Simulation	rust@create_full_hash	N/A	7 ms	N/A
❌	Simulation	rust@persistent_cache_restore_after_single_file_change@basic-react-development	27.4 ms	28 ms	-2.3%

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_{Comparing codex/compilation-stage-benches (eb0197d) with main (fff3f0f)¹}

Footnotes

1. No successful run was found on main (c925441) during the generation of this report, so fff3f0f was used instead as the comparison base. There might be some changes unrelated to this pull request in this report. ↩

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[Copilot]

Pull request overview

Adds new stage-isolated Rust CodSpeed benchmark cases to measure individual compilation passes, along with benchmark-local setup/reset helpers to keep each stage’s measurement focused.

Changes:

• Add new benchmarks for several compilation stages (mangle exports, runtime requirements, full hash, module assets, chunk assets, real content hash).
• Add benchmark-local helpers to prepare/reset compilation state between iterations.
• Expose several internal compilation pass types (and DisableCache) via new public re-exports in rspack_core.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 4 comments.

File	Description
xtask/benchmark/benches/groups/compilation_stages.rs	Adds new stage benchmarks and helpers to snapshot/reset compilation state and run individual passes.
crates/rspack_core/src/compilation/mod.rs	Publicly re-exports multiple pass types from private compilation modules.
crates/rspack_core/src/cache/mod.rs	Publicly re-exports DisableCache to support benchmarks.

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[chatgpt-codex-connector]

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