Avoid deep copying of the attrs when making arrow #509
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Pandas 2.2 has changed behaviour in treating the experimental 'attrs', and will copy the entire dict (for all columns) each time dframe[colname] is called. Instead of calling dframe[colname] for every column, we prepare the values upfront instead.
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As a bonus, the code is now also 25% faster also on Pandas 2.1.4 |
eivindjahren
approved these changes
Nov 25, 2024
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Pandas 2.2 has changed behaviour in treating the experimental 'attrs', and will copy the entire dict (for all columns) each time dframe[colname] is called.
Instead of calling dframe[colname] for every column, we prepare the values upfront instead.