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https://issues.apache.org/jira/browse/DIRAPI-162?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13848316#comment-13848316
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Emmanuel Lecharny commented on DIRAPI-162:
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The cache should be stored in the ThreadLocal storage to avoid the cost of 
synchronization. Also we should pre-load some very common strings we are 
frequently processing, and pin them in the cache.

> The CachingNormalizer class does not cache anything
> ---------------------------------------------------
>
>                 Key: DIRAPI-162
>                 URL: https://issues.apache.org/jira/browse/DIRAPI-162
>             Project: Directory Client API
>          Issue Type: Bug
>    Affects Versions: 1.0.0-M20
>            Reporter: Emmanuel Lecharny
>             Fix For: 1.0.0-RC1
>
>
> We waste a lot of CPU and memory by not caching elements. Most of the time, 
> we will process elements like 'ObjectClass', 
> '0.9.2342.19200300.100.1.1=admin,2.5.4.11=system' or 'ou=schema' tens f 
> thousands of time, when they are static elements that will never change.
> A very basic and limited cache could save us a lot of processing.



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