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Update lion_pytorch.py #1204

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Update lion_pytorch.py #1204

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2 changes: 1 addition & 1 deletion lion/lion_pytorch.py
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Original file line number Diff line number Diff line change
Expand Up @@ -78,7 +78,7 @@ def step(self, closure=None):
# Weight update
update = exp_avg * beta1 + grad * (1 - beta1)

p.add_(torch.sign(update), alpha=-group['lr'], inplace=True)
p.add_(torch.sign(update), alpha=-group['lr'])
#This has been made more efficient by using the torch.sign function's inplace mode.
#This will prevent the need to create a new tensor for the updated parameter,
#which can save a significant amount of time for large models.
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