[jira] [Created] (PDFBOX-5286) Runtime degredation in RC1 and alpha2

["Maruan Sahyoun (Jira)" <ji...@apache.org>]

Maruan Sahyoun created PDFBOX-5286:
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             Summary: Runtime degredation in RC1 and alpha2
                 Key: PDFBOX-5286
                 URL: https://issues.apache.org/jira/browse/PDFBOX-5286
             Project: PDFBox
          Issue Type: Bug
          Components: Parsing
    Affects Versions: 3.0.0 PDFBox
            Reporter: Maruan Sahyoun


working/reviewing PDFBOX-5068 and PDFBOX-5263 I've experiencing runtime issues for both 3.0.0-RC1 and 3.0.0-alpha2 when loading and saving a large PDF

https://crossasia-books.ub.uni-heidelberg.de/xasia/reader/download/506/506-42-86246-2-10-20190822.pdf 

||version||runtime in millis||
|2.0.24 |2076|
|3.0.0-RC1 |219472|
|3.0.0-alpha2 |282284|

Basic test:

{code:java}
long start = System.currentTimeMillis();
PDDocument pdf = Loader.loadPDF(new File("506-42-86246-2-10-20190822.pdf"));
pdf.save(new NullOutputStream());
pdf.close();        
long end = System.currentTimeMillis();      
System.out.println("Elapsed Time in milliseconds: "+ (end-start));     
{code}

with NullOuputStream

{code:java}
package org.apache.pdfbox;

import java.io.IOException;
import java.io.OutputStream;

public class NullOutputStream extends OutputStream {

    @Override
    public void write(byte[] b) throws IOException {
        // don't write anything
    }

    @Override
    public void write(byte[] b, int off, int len) throws IOException {
        // don't write anything
    }

    @Override
    public void write(int b) throws IOException {
        // don't write anything
    }
}
{code}

I've also running tests using JMH - they support these numbers. The difference in numbers for RC1/alpha2 are within a regular variation. 





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