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From bugzi...@apache.org
Subject DO NOT REPLY [Bug 49050] New: Inefficient concatenation of ContinueRecord contents in AbstractEscherHolderRecord
Date Tue, 06 Apr 2010 03:49:06 GMT
https://issues.apache.org/bugzilla/show_bug.cgi?id=49050

           Summary: Inefficient concatenation of ContinueRecord contents
                    in AbstractEscherHolderRecord
           Product: POI
           Version: 3.5-FINAL
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: major
          Priority: P2
         Component: HSSF
        AssignedTo: dev@poi.apache.org
        ReportedBy: trejkaz@trypticon.org


We encountered a spreadsheet with a lot of drawings in it, which resulted in a
DrawingGroupRecord which was so large it had multiple separate ContinueRecord
entries to make up all its data.

Subsequently, the gradual growing of the byte array as these were encountered
became a performance issue, with the file taking around 20 minutes to load.

I can't provide a sample file, but I will provide a patch which reduces this
case to around 3 seconds.

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