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Speed optimization: Block do not use their own Index objects #162

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wesm opened this issue Sep 21, 2011 · 1 comment
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Speed optimization: Block do not use their own Index objects #162

wesm opened this issue Sep 21, 2011 · 1 comment
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Enhancement Internals Related to non-user accessible pandas implementation Performance Memory or execution speed performance Refactor Internal refactoring of code

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@wesm
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wesm commented Sep 21, 2011

A lot of time is spent in Index.new in some computations. I do not think there's an essential need to create Index objects when you could just have an array of integers referring back to the single Index having all the column names for the DataFrame. This would also facilitate renaming as renaming would only need to happen in one place. Definitely not a trivial refactor and would unfortunately break legacy pickles yet again. "For the greater good"
@immerrr immerrr mentioned this issue Mar 30, 2014
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@immerrr immerrr mentioned this issue Apr 25, 2014
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jreback commented Apr 25, 2014

closed by #6745

@jreback jreback closed this as completed Apr 25, 2014
dan-nadler pushed a commit to dan-nadler/pandas that referenced this issue Sep 23, 2019
@bmoscon
Feature pandas-dev#162 (pandas-dev#188)
882620b 
* Feature pandas-dev#162 - rename method for ChunkStore to allow symbol renaming
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