[jira] [Commented] (PDFBOX-4691) JPEGFactory should not decode JPEG files when only meta data is needed

["ASF subversion and git services (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/PDFBOX-4691?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16975970#comment-16975970 ] 

ASF subversion and git services commented on PDFBOX-4691:
---------------------------------------------------------

Commit 1869925 from Tilman Hausherr in branch 'pdfbox/branches/issue45'
[ https://svn.apache.org/r1869925 ]

PDFBOX-4691: avoid decoding JPEG raster, try using metadata instead to lessen time and memory footprint

> JPEGFactory should not decode JPEG files when only meta data is needed
> ----------------------------------------------------------------------
>
>                 Key: PDFBOX-4691
>                 URL: https://issues.apache.org/jira/browse/PDFBOX-4691
>             Project: PDFBox
>          Issue Type: Improvement
>    Affects Versions: 2.0.17
>            Reporter: Tilman Hausherr
>            Assignee: Tilman Hausherr
>            Priority: Major
>              Labels: optimization
>             Fix For: 2.0.18, 3.0.0 PDFBox
>
>
> {{JPEGFactory.createFromByteArray}} calls {{JPEGFactory.readJPEGRaster}} to get the (decoded) raster although only meta data (size and number of data elements) is needed. This should be optimized so that only the meta data is used, if possible. The current behavior should be kept as fallback.



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