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facebookresearch / detectron2 Public

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use non-sync BN if world_size==1#4679

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ppwwyyxx wants to merge 1 commit intofacebookresearch:mainfacebookresearch/detectron2:mainfrom ppwwyyxx:syncbnppwwyyxx/detectron2:syncbnCopy head branch name to clipboard

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use non-sync BN if world_size==1
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