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Improve pandas dataframe allocation #23

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dovahcrow opened this issue Mar 2, 2021 · 1 comment

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dovahcrow commented Mar 2, 2021

Currently it takes 30s for allocating the tpch lineitem x 10 table. To compare, rust requires 10us (maybe unfair), pure numpy takes 4 secs.

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dovahcrow commented Mar 2, 2021

use object instead of the string extension array.
allocate blocks instead of column by column.

wangxiaoying mentioned this issue

Speed up pandas dataframe allocation #35

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wangxiaoying closed this as completed

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