Rust 1.95 stabilized [`std::hint::cold_path`](https://doc.rust-lang.org/std/hint/fn.cold_path.html), re-exported via `oxc_data_structures::branch_hints` in #24368. This replaces the `cold_branch` closure trampoline with `cold_path()` at the **14 call sites where the hint only guides branch layout** — straight-line code instead of closure ceremony.

The other **10 sites keep `cold_branch` deliberately**: they build diagnostics, and several document (e.g. `cursor.rs` `asi()`, `punctuation.rs` `<!--`, `string.rs`, `numeric.rs`) that the `#[cold]` trampoline exists to keep the ~232-byte `OxcDiagnostic` return buffer out of the hot function's stack frame. `cold_path` only sets branch weights — it does not outline code or stack usage — so replacing those sites would regress that. `cold_branch`'s doc comment now explains when to use which.

One small unlock while here: the comment in `skip_multi_line_comment` saying we "can't use `return` in a closure" to jump to the faster post-line-break search — that limitation is gone now the closure is gone; left as a possible follow-up since it's a behavior change.

Verified:
- `cargo test -p oxc_parser` and clippy clean.
- Parser conformance (test262 / babel / typescript / misc): **zero snapshot diffs**.
- Codegen-wise the replaced sites were tiny closures that inlined into the trampoline anyway; CodSpeed on this PR is the final perf gate.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

### 🚀 Features

- 616bfa2 minifier: Remove unreachable code after terminating statements
(#24441) (Dunqing)
- ddab89a data_structures: Add `likely` and `unlikely` functions
(#24368) (overlookmotel)
- a3a39f9 react_compiler: Implement enableEmitHookGuards codegen
(#24329) (Boshen)
- b79eef7 minifier: Apply De Morgan's law to negated comparison chains
in jump guards and loop tests (#24279) (Dunqing)
- 34ff7b4 minifier: Drop write-only property assignments to unused local
bindings by default (#24112) (Dunqing)
- 1b829d8 semantic: Record const enums in EnumData (#24268) (Dunqing)
- ba0944c semantic: Add `Scoping::set_symbol_span` (#24221) (camc314)

### 🐛 Bug Fixes

- 7d33363 minifier: Preserve guaranteed throws from class heritage
evaluation (#24349) (Dunqing)
- 058a62f semantic: Track ambient contexts in `SemanticBuilder` (#24327)
(camc314)
- 721eb0b transformer/decorator: Scope accessor class binding (#24330)
(camc314)
- 1ebdce3 semantic: Allow reserved keywords in ambient declaration types
(#24325) (camc314)
- 460176a track-memory-allocations: Exclude arena chunks from Sys allocs
(#24292) (Dunqing)
- af4922b transformer: Clear lowered namespace redeclarations (#24300)
(camc314)
- ffd2765 semantic: Mark declared computed `MethodDefinition`s as type
references (#24296) (camc314)
- f17514b isolated-declarations: Emit const readonly fields as types
(#24288) (camc314)
- 40f769d minifier: Make `__proto__` write tracking execution-order
independent (#24280) (Dunqing)
- 6371fed transformer: Remove stale enum member bindings (#24272)
(camc314)
- f05dfab transformer: Correct symbol flags for lowered namespaces
(#24271) (Dunqing)
- 84eeb55 transformer: Correct symbol flags for lowered enums (#24269)
(Dunqing)
- c3057da transformer: Preserve generated class binding spans (#24220)
(camc314)
- 8260096 transformer: Correct span for lowered namespace symbol
(#24222) (camc314)
- 42d00d3 semantic: Mark declared class heritage as type references
(#24237) (camc314)
- 588d997 semantic: Mark TS `PropertyDefinition`s computed fields as
type references (#24233) (camc314)
- 9b95632 semantic: Mark computed method keys in `TSMethodSignature`s as
type references (#24232) (camc314)

### ⚡ Performance

- 5b26643 transformer_plugins: Dispatch global defines by trailing name
(#23666) (Boshen)
- dce0f29 react_compiler: Replace all compiled functions in a single AST
walk (#24403) (Boshen)
- f85f0d8 ast: Delegate inherited enum variants in clone_in and estree
derives (#23555) (Boshen)
- 3ff0234 allocator: Remove `unwrap` from `ReplaceWith` (#24365)
(overlookmotel)
- ab22e80 transformer: Fix Rust 1.97 performance regression (#24354)
(camc314)
- b47585c parser: Use `ReplaceWith` instead of `TakeIn` (#24018)
(overlookmotel)
- b227a06 minifier: Use `ReplaceWith` instead of `TakeIn` (#24017)
(overlookmotel)

Co-authored-by: Boshen <[email protected]>