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Posted to dev@pdfbox.apache.org by "Maruan Sahyoun (Jira)" <ji...@apache.org> on 2021/11/13 15:15:00 UTC
[jira] [Comment Edited] (PDFBOX-5286) Runtime degredation in RC1 and alpha2
[ https://issues.apache.org/jira/browse/PDFBOX-5286?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17443114#comment-17443114 ]
Maruan Sahyoun edited comment on PDFBOX-5286 at 11/13/21, 3:14 PM:
-------------------------------------------------------------------
result:
{noformat}
Benchmark Mode Cnt Score Error Units
PDFBoxPerformance.saveNoCompressionMediumFile ss 5 1389,974 ± 231,578 ms/op
PDFBoxPerformance.saveNoCompressionLargeFile ss 5 4652,939 ± 1029,527 ms/op
{noformat}
was (Author: msahyoun):
result:
{noformat}
Benchmark Mode Cnt Score Error Units
PDFBoxPerformance.saveNoCompressionMediumFile ss 5 1550,625 ± 188,420 ms/op
PDFBoxPerformance.saveNoCompressionLargeFile ss 5 8056,534 ± 2388,800 ms/op
{noformat}
> 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
> Priority: Critical
>
> 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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