# Why DataFrames v.0.21.2 (julia v1.4.2) requires more memory than the previous version

**URL:** <https://discourse.julialang.org/t/why-dataframes-v-0-21-2-julia-v1-4-2-requires-more-memory-than-the-previous-version/41171>\
**Category:** Performance\
**Tags:** dataframes\
**Created:** [June 10, 2020, 11:55pm UTC](https://discourse.julialang.org/t/why-dataframes-v-0-21-2-julia-v1-4-2-requires-more-memory-than-the-previous-version/41171 "2020-06-10T23:55:42Z")\
**Posts on this page:** 1\
**Showing post:** 11

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**Author:** ![BMval](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/bmval/32/7647_2.png) [@BMval](https://discourse.julialang.org/u/BMval)\
**Post date:** [June 11, 2020, 1:02am UTC](https://discourse.julialang.org/t/why-dataframes-v-0-21-2-julia-v1-4-2-requires-more-memory-than-the-previous-version/41171/11 "2020-06-11T01:02:00Z")

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much of columns is int64.

Oh, I understand. csv has a char, int64 is twice large.!!!

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