Merge pull request #4774 from not522/shallow-copy-trial

Use shallow copy in `_get_latest_trial`
optuna · Jul 12, 2023 · 8409371 · 8409371
2 parents 4513785 + 84d71ba
commit 8409371
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/optuna/trial/_trial.py b/optuna/trial/_trial.py
@@ -687,7 +687,7 @@ def _check_distribution(self, name: str, distribution: BaseDistribution) -> None
 
     def _get_latest_trial(self) -> FrozenTrial:
         # TODO(eukaryo): Remove this method after `system_attrs` property is removed.
-        latest_trial = copy.deepcopy(self._cached_frozen_trial)
+        latest_trial = copy.copy(self._cached_frozen_trial)
         latest_trial.system_attrs = _LazyTrialSystemAttrs(  # type: ignore[assignment]
             self._trial_id, self.storage
         )