diff --git a/codes/data/__init__.py b/codes/data/__init__.py
index ca59477a..cc1d9e86 100644
--- a/codes/data/__init__.py
+++ b/codes/data/__init__.py
@@ -22,7 +22,7 @@ def create_dataloader(dataset, dataset_opt, opt=None, sampler=None):
                                            pin_memory=False)
     else:
         batch_size = dataset_opt['batch_size'] or 1
-        return torch.utils.data.DataLoader(dataset, batch_size=batch_size, shuffle=False, num_workers=0,
+        return torch.utils.data.DataLoader(dataset, batch_size=batch_size, shuffle=False, num_workers=int(batch_size/2),
                                            pin_memory=False)