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https://issues.apache.org/jira/browse/DIRAPI-424?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18019523#comment-18019523
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Emmanuel Lécharny commented on DIRAPI-424:
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It's a bit more complex that that: the {{AttributeType}} inherits from the 
{{AbstractSchemaObject}} which already keep a computed hash value, except that 
this hash value is not recomputed when the {{AttributeType}} instance get 
modified, which is badly wrong...

> The AttributeType hashCode method can use a pre-computed value
> --------------------------------------------------------------
>
>                 Key: DIRAPI-424
>                 URL: https://issues.apache.org/jira/browse/DIRAPI-424
>             Project: Directory Client API
>          Issue Type: Improvement
>            Reporter: Emmanuel Lécharny
>            Priority: Minor
>
> When we call the {{hashCode()}} method, it computes the hashcode, which is 
> expected. Except that an {{AttributeType}} instance is pretty much immutable.
> So we could spare some CPU by using a static value that will hold the hash 
> code, and rehash if needed in the setters



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