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torcharrow.dataframe.where实测速度慢于pandas.DataFrame.where #516
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@yonger001
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问题一:同张表同约束下,ta.where速度较pd.where慢很多;
问题二:调用ta.dataframe相关操作(如:where、sort等)会出现Userwarning,例如:append for type StringColumnCpu is supported only with prototype implementation, which may result in degenerated performance.
上面中的prototye implementation具体指?
thank you!
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