[jira] Resolved: (PDFBOX-441) remove CosName nameMap cache

["Andreas Lehmkühler (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/PDFBOX-441?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Andreas Lehmkühler resolved PDFBOX-441.
---------------------------------------

       Resolution: Fixed
    Fix Version/s: 1.2.0

With version 928461 I've replaced the WeakHashMap with a ConcurrentHashMap.

> remove CosName nameMap cache
> ----------------------------
>
>                 Key: PDFBOX-441
>                 URL: https://issues.apache.org/jira/browse/PDFBOX-441
>             Project: PDFBox
>          Issue Type: Improvement
>    Affects Versions: 0.7.3
>            Reporter: Sean Bridges
>            Priority: Minor
>             Fix For: 1.2.0
>
>
> The CosName class keeps a cache of all instances created in a static synchronized map.  I am guessing this is for performance reasons to avoid creating objects, but in our system it is causing performance problems.  We are running 7 threads extracting text from pdf's, and we can see a large number of conflicts reading from nameMap.
> The CosName map is also a potential memory leak, which forces users to periodically clear it, as noted in PDFBOX-351
> Can nameMap be removed altogether?
> At the least, if PDSimpleFont replaced, 
>  COSName.getPDFName( "FontDescriptor" ) 
> with 
> COSName.FONT_DESC
> It would reduce contention.

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