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https://issues.apache.org/jira/browse/PDFBOX-5224?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17368581#comment-17368581
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ASF subversion and git services commented on PDFBOX-5224:
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Commit 1891007 from Tilman Hausherr in branch 'pdfbox/branches/2.0'
[ https://svn.apache.org/r1891007 ]
PDFBOX-5224: optimize reading of 1bit images, by Gunnar Brand; closes #122
> Optimize SampledImageReader.from1Bit()
> --------------------------------------
>
> Key: PDFBOX-5224
> URL: https://issues.apache.org/jira/browse/PDFBOX-5224
> Project: PDFBox
> Issue Type: Improvement
> Components: Rendering
> Affects Versions: 2.0.24
> Reporter: Tilman Hausherr
> Assignee: Tilman Hausherr
> Priority: Major
> Fix For: 2.0.25, 3.0.0 PDFBox
>
>
> From Gunnar Brand:
> {quote}This fixes an issue with a missed logged error + loop breaking if an
> erroneous read falls onto a skipped row.
> It also improves the speed at least by factor twice (due to sign test instead
> of bit masking and boolean flag for subsampling).
> It will be even faster with regions, as there was a poor design choice of
> full inner loop computations even if x was below startX.
> {quote}
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