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https://issues.apache.org/jira/browse/OAK-1050?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13779477#comment-13779477
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Jukka Zitting commented on OAK-1050:
------------------------------------
As a followup, in revision 1526757 I adjusted the definition of equals() and
hashCode() for Blobs to make them easier and more efficient to implement across
different backends.
> Remove Blob.sha256()
> --------------------
>
> Key: OAK-1050
> URL: https://issues.apache.org/jira/browse/OAK-1050
> Project: Jackrabbit Oak
> Issue Type: Improvement
> Components: core
> Reporter: Jukka Zitting
> Assignee: Jukka Zitting
>
> The {{Blob.sha256()}} method can be really expensive as the MicroKernel
> doesn't keep track of that information and thus the method may result in a
> full scan of potentially gigabytes of data. Furthermore the method is only
> used for internal purposes.
> Thus I suggest that we remove the method from the public Blob interface and
> keep the functionality only as an implementation detail for now. We can
> always bring back the method or something similar when there is real need for
> it.
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