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lookup slot in hash() #6102

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Merged
coolreader18 merged 3 commits into from
Sep 4, 2025
Merged

lookup slot in hash() #6102

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41a956a
fast-path hash() for exact PyStr
giammirove Aug 18, 2025
6a29c4c
avoid get_class_attr for __hash__; read hash slot via mro_find_map
giammirove Aug 20, 2025
32c74b8
fix linting in hash function
giammirove Aug 20, 2025
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5 changes: 5 additions & 0 deletions vm/src/protocol/object.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -642,6 +642,11 @@ impl PyObject {
}

pub fn hash(&self, vm: &VirtualMachine) -> PyResult<PyHash> {
// __hash__ function in str cannot be overwritten
if let Some(pystr) = self.downcast_ref_if_exact::<PyStr>(vm) {
return Ok(pystr.hash(vm));
}

let hash = self.get_class_attr(identifier!(vm, __hash__)).unwrap();
if vm.is_none(&hash) {
return Err(vm.new_exception_msg(
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