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Posted to dev@pdfbox.apache.org by "Andreas Lehmkühler (JIRA)" <ji...@apache.org> on 2013/12/23 19:52:01 UTC
[jira] [Assigned] (PDFBOX-1808) PDFTextStripper.getText - hight
memory usage
[ https://issues.apache.org/jira/browse/PDFBOX-1808?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Andreas Lehmkühler reassigned PDFBOX-1808:
------------------------------------------
Assignee: Andreas Lehmkühler
> PDFTextStripper.getText - hight memory usage
> --------------------------------------------
>
> Key: PDFBOX-1808
> URL: https://issues.apache.org/jira/browse/PDFBOX-1808
> Project: PDFBox
> Issue Type: Bug
> Components: Text extraction
> Affects Versions: 1.8.2, 1.8.3
> Environment: Windows 7
> Java jdk 1.7.0_45
> Reporter: Guyenot Jeremy
> Assignee: Andreas Lehmkühler
> Priority: Critical
> Labels: performance
> Attachments: 1808-java char copyof.jpg, 1808-java char copyofrange.jpg, 1808-java usage.jpg, 1808-pdfbox usage.jpg, 1808-snapshot.nps, DOSSIER DE CANDIDATURE_001.pdf, s5-1.png, s5-2.png, s50-1.png, s50-2.png
>
> Original Estimate: 72h
> Remaining Estimate: 72h
>
> Hello,
> i'm trying to extract text from pdfs but i can find that the PDFTextStripper use a lot of memory.
> With a pdf that have 2676 pages (for a 4.6Mo size) it use 1.5Go memory.
> I also constat that the memory is'nt free after the getText method is called.
> You can see my code bellow:
> double virgule = Math.pow(10, 2);
> System.out.println("START - Total memory (Mo): " + Math.round((Runtime.getRuntime().totalMemory()/1000000) * virgule) / virgule);
> PDDocument cd = PDDocument.load(file);
> System.out.println("PDDocument getNumberOfPages - Nombre de pages: " + cd.getNumberOfPages());
> System.out.println("PDDocument load - Total memory (Mo): " + Math.round((Runtime.getRuntime().totalMemory()/1000000) * virgule) / virgule);
> String pdfText = "";
> try{
> PDFTextStripper stripper = new PDFTextStripper();
> pdfText = stripper.getText(cd);
> System.out.println("PDFTextStripper getText - Total memory (Mo): " + Math.round((Runtime.getRuntime().totalMemory()/1000000) * virgule) / virgule);
> stripper.resetEngine();
> stripper = null;
> System.out.println("PDFTextStripper resetEngine - Total memory (Mo): " + Math.round((Runtime.getRuntime().totalMemory()/1000000) * virgule) / virgule);
> }
> finally{
> if( cd!=null ){
> cd.close();
> cd = null;
> System.out.println("PDDocument close - Total memory (Mo): " + Math.round((Runtime.getRuntime().totalMemory()/1000000) * virgule) / virgule);
> }
> }
> retour = new TextField(fieldName, pdfText, Field.Store.NO);
> System.out.println("TextField - Total memory (Mo): " + Math.round((Runtime.getRuntime().totalMemory()/1000000) * virgule) / virgule);
> And the result into my output window:
> START - Total memory (Mo): 95.0
> PDDocument getNumberOfPages - Nombre de pages: 2676
> PDDocument load - Total memory (Mo): 121.0
> PDFTextStripper getText - Total memory (Mo): 757.0
> PDFTextStripper resetEngine - Total memory (Mo): 757.0
> PDDocument close - Total memory (Mo): 757.0
> TextField - Total memory (Mo): 757.0
> pdfText - Total memory (Mo): 757.0
> I also try to call System.gc() but the memory use is the same.
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