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Struts & Hibernate
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| | | -none- | -none- 2007-10-04 - By Paulo Soares
Back
You can set "Document.plainRandomAccess=true" to have the old behavior.
Paulo
> -- --Original Message-- --
> From: itext-questions-bounces@(protected)
> [mailto:itext-questions-bounces@(protected)] On
> Behalf Of Eric Vray
> Sent: Monday, October 01, 2007 1:59 PM
> To: iText mailing list
> Subject: [iText-questions] Pages extraction : performances issues
>
> Hi all,
>
> I'm using iText (1.4.1) to extract pages from existing PDF files.
> I have upgraded to a recent release (2.0.5) and a big slow
> down appeared.
>
> I tried to test each release since 1.4.1 and found the performances
> issues began with 1.4.5 (maybe caused by the changes listed in release
> notes as "used a MappedByteBuffer instead of a RandomAccessFile" ?)
>
> For example, extracting 1759 pages from a 167Mb/75000 pages PDF takes
> 40s with iText 1.4.4 and 170s with iText 1.4.5 to 2.0.5 (no
> differences
> between 2.0.4 and 2.0.5 in spite of RandowAccessFileOrArray changes)
>
> the test code I used :
>
> /**
> * @(protected) inf input file
> * @(protected) p1 first page to extract
> * @(protected) p2 last page to extract
> * @(protected) ouf output file
> */
> public void split(File inf,
> int p1,
> int p2,
> File ouf)
> throws Exception {
>
> FileOutputStream fos = new FileOutputStream(ouf);
> Document doc = new Document();
>
> // use a RandomAccessFileOrArray to limit memory size
> // during extraction
>
> PdfReader reader = new PdfReader(
> new RandomAccessFileOrArray(inf.getAbsolutePath()),
> null);
>
> PdfCopy writer = new PdfCopy(doc, fos);
> document.open();
>
> for(int pageno=p1; pageno<=p2; pageno++){
> PdfImportedPage page = writer.getImportedPage(
> reader, pageno);
> writer.addPage(page);
> }
>
> doc.close();
> writer.close();
> fos.close();
> }
>
> Regards,
> Eric
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