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perf(semantic): reuse Atom #10771

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graphite-app merged 1 commit into from
May 3, 2025
Merged

perf(semantic): reuse Atom #10771

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11 changes: 4 additions & 7 deletions crates/oxc_semantic/src/scoping.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -800,19 +800,16 @@ impl Scoping {
/// Panics in debug mode if either of the above are not satisfied.
pub fn rename_symbol(&mut self, symbol_id: SymbolId, scope_id: ScopeId, new_name: &str) {
self.cell.with_dependent_mut(|allocator, cell| {
// Rename symbol name.
let old_name = mem::replace(
&mut cell.symbol_names[symbol_id.index()],
Atom::from_in(new_name, allocator),
);
// Rename symbol
let new_name = Atom::from_in(new_name, allocator);
let old_name = mem::replace(&mut cell.symbol_names[symbol_id.index()], new_name);

// Rename binding, same as `Self::rename_binding`, we cannot call it directly
// because the `old_name` borrowed `cell`.
let bindings = &mut cell.bindings[scope_id];
let old_symbol_id = bindings.remove(old_name.as_str());
debug_assert_eq!(old_symbol_id, Some(symbol_id));
let new_name = allocator.alloc_str(new_name);
let existing_symbol_id = bindings.insert(new_name, symbol_id);
let existing_symbol_id = bindings.insert(new_name.as_str(), symbol_id);
debug_assert!(existing_symbol_id.is_none());
});
}
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