[jira] [Updated] (ARROW-85) C++: memcmp can be avoided in Equal when comparing with the same Buffer

["Antoine Pitrou (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/ARROW-85?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Antoine Pitrou updated ARROW-85:
--------------------------------
    Component/s: C++

> 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
>          Components: C++
>            Reporter: Kai Zheng
>            Assignee: Kai Zheng
>            Priority: Major
>             Fix For: 0.1.0
>
>
> 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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