Benjamin WoodruffandGitHub ae0603c4ee Turbopack: bincode: Remove automatic serde derives from #[turbo_tasks::value] macro (#86634) ...

Removing the automatic `serde` derives from `#[turbo_tasks::value]` should remove most of the macro expansion. I'll follow up with removing all the manual derives.

This also removes `Serialize` from `NextConfig`, leaving only `Deserialize`. The `Serialization` derive is no longer needed after some of @mischnic's fixes to edge templates.

Because this is trivially-eliminated dead code, there should be no user-facing benefit from removing this code, but there should be some improvements to our own workflows.

## Build Time: `cargo build -p next-swc-napi`

This gives a ~2% improvement to cold cargo build times with the debug profile.

```
$ hyperfine -w 1 -r 10 -p 'git co 3bb0bcbf82 && cargo clean' -p 'git co bgw/rm-value-serde && cargo clean' 'cargo build -p next-swc-napi' 'cargo build -p next-swc-napi'
Benchmark 1: cargo build -p next-swc-napi
  Time (mean ± σ):     226.424 s ±  2.819 s    [User: 1943.869 s, System: 85.058 s]
  Range (min … max):   222.736 s … 232.369 s    10 runs

Benchmark 2: cargo build -p next-swc-napi
  Time (mean ± σ):     220.957 s ±  6.535 s    [User: 1940.188 s, System: 87.074 s]
  Range (min … max):   213.891 s … 231.464 s    10 runs

Summary
  cargo build -p next-swc-napi ran
    1.02 ± 0.03 times faster than cargo build -p next-swc-napi
```

This is in addition to the ~2% improvement observed in https://github.com/vercel/next.js/pull/86631

**Percentage improvements to incremental build times are likely greater than shown here**, as cold builds include all of our dependencies, which are not touched by this PR.

2025-12-12 09:09:37 -08:00

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fail_contains_only_vc.rs

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fail_contains_only_vc.stderr

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fail_contains_resolved_vc_and_vc.rs

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fail_contains_resolved_vc_and_vc.stderr

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fail_contains_vc_inside_generic.rs

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fail_contains_vc_inside_generic.stderr

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fail_simple_enum.rs

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fail_simple_enum.stderr

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fail_simple_named_struct.rs

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fail_simple_named_struct.stderr

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fail_simple_unnamed_struct.rs

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fail_simple_unnamed_struct.stderr

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fail_underconstrained_generic.rs

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fail_underconstrained_generic.stderr

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pass_contains_resolved_vc.rs

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pass_ignore_field.rs

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pass_lifetimes.rs

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pass_linked_list.rs

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pass_phantom_data.rs

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pass_simple_enums.rs

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pass_simple_structs.rs

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