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https://issues.apache.org/jira/browse/ARROW-85?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Kai Zheng updated ARROW-85:
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    Description: 
It looks too expensive to use memcmp to compare two buffers. Instead, the 
starting address and length/capacity would be good enough to use. Higher level 
codes relying on memcmp behaviour can be done in higher level.

Update: memcmp should be avoided in Equal when comparing with the same Buffer. 
In other cases, it's still needed to know the content are the same or not.

  was:It looks too expensive to use memcmp to compare two buffers. Instead, the 
starting address and length/capacity would be good enough to use. Higher level 
codes relying on memcmp behaviour can be done in higher level.


> C++: memcmp can be avoided in Equal when comparing with the same Buffer
> -----------------------------------------------------------------------
>
>                 Key: ARROW-85
>                 URL: https://issues.apache.org/jira/browse/ARROW-85
>             Project: Apache Arrow
>          Issue Type: Improvement
>            Reporter: Kai Zheng
>
> It looks too expensive to use memcmp to compare two buffers. Instead, the 
> starting address and length/capacity would be good enough to use. Higher 
> level codes relying on memcmp behaviour can be done in higher level.
> Update: memcmp should be avoided in Equal when comparing with the same 
> Buffer. In other cases, it's still needed to know the content are the same or 
> not.



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