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https://issues.apache.org/jira/browse/ARROW-6926?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16978546#comment-16978546
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Joris Van den Bossche commented on ARROW-6926:
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Ah, thanks. But it seems cython is adding a bit more still:
{code}
In [21]: a = pa.array([1]*10)
In [22]: sys.getsizeof(a)
Out[22]: 96
In [23]: object.__sizeof__(a)
Out[23]: 72
{code}
(not sure how much we care about those small numbers, in reality users will
mainly care for big arrays where the nbytes dominates the result)
> [Python] Support __sizeof__ protocol for Python objects
> -------------------------------------------------------
>
> Key: ARROW-6926
> URL: https://issues.apache.org/jira/browse/ARROW-6926
> Project: Apache Arrow
> Issue Type: Improvement
> Components: Python
> Reporter: Matthew Rocklin
> Priority: Minor
> Fix For: 1.0.0
>
>
> It would be helpful if PyArrow objects implemented the `__sizeof__` protocol
> to give other libraries hints about how much data they have allocated. This
> helps systems like Dask, which have to make judgements about whether or not
> something is cheap to move or taking up a large amount of space.
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