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fix: avoid deep-copying the checkpoint in load_pretrained_model #3729

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Merged
LauraGPT merged 1 commit into from
Sep 26, 2026
Merged

fix: avoid deep-copying the checkpoint in load_pretrained_model #3729

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6 changes: 4 additions & 2 deletions funasr/train_utils/load_pretrained_model.py
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Original file line number Diff line number Diff line change
Expand Up @@ -8,7 +8,6 @@
import torch.nn
import torch.optim
import pdb
import copy


def load_pretrained_model(
Expand Down Expand Up @@ -41,7 +40,10 @@ def load_pretrained_model(
buffer = BytesIO(oss_bucket.get_object(path).read())
ori_state = torch.load(buffer, map_location=map_location)

src_state = copy.deepcopy(ori_state)
# ori_state is created by torch.load inside this function, is not shared
# with the caller, and is not read again below; src_state is only read.
# Deep-copying every tensor here doubles peak load memory with no effect.
src_state = ori_state
src_state = src_state["state_dict"] if "state_dict" in src_state else src_state
src_state = src_state["model_state_dict"] if "model_state_dict" in src_state else src_state
src_state = src_state["model"] if "model" in src_state else src_state
Expand Down