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    • Y
      Add COWPtr and its unittest · 0cfb5465
      Yang Yu 提交于
      It will be used for LoD information in LoDTensor since LoD is a copy
      on write field.
      
      It is pretty slow for copying LoD information between operators. For
      resnet it will cost roughly 10% time of whole time, including reading
      data.
      0cfb5465