chore: Add default-features = false

[kdy1]

Description:

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Latest commit: e3b0b90

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[claude]

Claude finished @kdy1's task —— View job

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PR Review: Add default-features = false

Review Progress:

• Read and analyze the changed Cargo.toml file
• Evaluate impact of disabling default features
• Check alignment with codebase guidelines
• Provide comprehensive feedback on code quality, bugs, performance, security, and test coverage
• Submit final review

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📋 Review Summary

This PR adds default-features = false to 5 internal SWC dependencies in crates/binding_macros/Cargo.toml. The changes are solid and recommended.

✅ Positive Aspects

Performance & Binary Size:

• Excellent alignment with CLAUDE.md guideline ecmascript parser #1: "Write performant code. Always prefer performance over other things"
• Reduces binary size by excluding unnecessary features, especially important for WASM bindings
• Only the most significant impact is on swc crate, which disables ["es3", "lint", "isolated-dts"] by default

Code Quality:

• Clean, minimal change that follows Rust best practices
• Consistent application across all internal SWC dependencies
• Maintains optional feature activation through the existing binding_wasm feature

🔍 Technical Impact Analysis

What gets disabled:

• swc crate: ES3 compatibility transforms, linting functionality, and isolated TypeScript definition generation
• Other crates (swc_common, swc_ecma_ast, swc_ecma_visit): Already have empty default = [], so no impact

Runtime behavior:

• ✅ No breaking changes - features are still available via explicit activation
• ✅ Binding macros only need core functionality, not the disabled features
• ✅ WASM bindings remain fully functional

🔒 Security & Stability

• ✅ No security concerns - only removes optional compilation features
• ✅ No API changes or behavioral modifications
• ✅ Dependencies remain the same, just with reduced default surface area

🧪 Test Coverage

• ✅ No additional tests needed - this is a build configuration change
• ✅ Existing tests will continue to work as features are still available when explicitly enabled
• ✅ CI should verify that builds complete successfully

🎯 Recommendation

✅ APPROVE - This is a well-executed optimization that:

1. Reduces compilation overhead and binary size
2. Follows the codebase's performance-first philosophy
3. Maintains backward compatibility
4. Uses Rust's feature system correctly

The change is particularly valuable for WASM builds where bundle size matters significantly.

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[github-actions]

Binary Sizes

File	Size
swc.linux-x64-gnu.node	32M (32959328 bytes)

Commit: 8e6342a

[codspeed-hq]

CodSpeed Performance Report

Merging #11193 will not alter performance

_{Comparing kdy1/size4 (e3b0b90) with main (4c6df95)}

Summary

✅ 138 untouched
⏩ 13 skipped¹

Footnotes

1. 13 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. ↩