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https://issues.apache.org/jira/browse/SOLR-5819?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13921479#comment-13921479
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Robert Muir commented on SOLR-5819:
-----------------------------------
Hoss: exactly. Compare pdfimages -l to the release'd PDF against the one i
deduped.
after deduping you can see the reuse (see object)
{noformat}
rmuir@beast:~/Downloads$ pdfimages -list apache-solr-ref-guide-4.7.pdf | more
page num type width height color comp bpc enc interp object ID
---------------------------------------------------------------------
1 0 image 283 156 rgb 3 8 image no 3 0
1 1 smask 283 156 gray 1 8 image no 3 0
1 2 image 16 16 rgb 3 8 image no 8 0
1 3 smask 16 16 gray 1 8 image no 8 0
1 4 image 16 16 rgb 3 8 image no 10 0
1 5 smask 16 16 gray 1 8 image no 10 0
1 6 image 16 16 rgb 3 8 image no 12 0
1 7 smask 16 16 gray 1 8 image no 12 0
1 8 image 16 16 rgb 3 8 image no 14 0
1 9 smask 16 16 gray 1 8 image no 14 0
1 10 image 16 16 rgb 3 8 image no 16 0
1 11 smask 16 16 gray 1 8 image no 16 0
1 12 image 16 16 rgb 3 8 image no 18 0
1 13 smask 16 16 gray 1 8 image no 18 0
1 14 image 16 16 rgb 3 8 image no 20 0
1 15 smask 16 16 gray 1 8 image no 20 0
1 16 image 16 16 rgb 3 8 image no 22 0
1 17 smask 16 16 gray 1 8 image no 22 0
1 18 image 16 16 rgb 3 8 image no 24 0
1 19 smask 16 16 gray 1 8 image no 24 0
1 20 image 16 16 rgb 3 8 image no 26 0
1 21 smask 16 16 gray 1 8 image no 26 0
1 22 image 16 16 rgb 3 8 image no 28 0
{noformat}
rmuir@beast:~/Downloads$ pdfimages -list test.pdf | more
{noformat}
page num type width height color comp bpc enc interp object ID
---------------------------------------------------------------------
1 0 image 283 156 rgb 3 8 image no 11 0
1 1 smask 283 156 gray 1 8 image no 11 0
1 2 image 16 16 rgb 3 8 image no 3 0
1 3 smask 16 16 gray 1 8 image no 3 0
1 4 image 16 16 rgb 3 8 image no 8 0
1 5 smask 16 16 gray 1 8 image no 8 0
1 6 image 16 16 rgb 3 8 image no 9 0
1 7 smask 16 16 gray 1 8 image no 9 0
1 8 image 16 16 rgb 3 8 image no 6 0
1 9 smask 16 16 gray 1 8 image no 6 0
1 10 image 16 16 rgb 3 8 image no 8 0
1 11 smask 16 16 gray 1 8 image no 8 0
1 12 image 16 16 rgb 3 8 image no 3 0
1 13 smask 16 16 gray 1 8 image no 3 0
1 14 image 16 16 rgb 3 8 image no 8 0
1 15 smask 16 16 gray 1 8 image no 8 0
1 16 image 16 16 rgb 3 8 image no 9 0
1 17 smask 16 16 gray 1 8 image no 9 0
1 18 image 16 16 rgb 3 8 image no 8 0
1 19 smask 16 16 gray 1 8 image no 8 0
1 20 image 16 16 rgb 3 8 image no 6 0
1 21 smask 16 16 gray 1 8 image no 6 0
1 22 image 16 16 rgb 3 8 image no 6 0
1 23 smask 16 16 gray 1 8 image no 6 0
1 24 image 16 16 rgb 3 8 image no 8 0
1 25 smask 16 16 gray 1 8 image no 8 0
1 26 image 16 16 rgb 3 8 image no 3 0
{noformat}
> Investigate & reduce size of ref-guide PDF
> ------------------------------------------
>
> Key: SOLR-5819
> URL: https://issues.apache.org/jira/browse/SOLR-5819
> Project: Solr
> Issue Type: Improvement
> Reporter: Hoss Man
>
> As noted on the solr-user mailing list in response to the ANNOUNCE about the
> 4.7 ref guide, the size of the 4.4, 4.5 & 4.6 PDF files were all under 5MB,
> but the 4.7 PDF was 30MB.
> opening this issue to track trying to reduce this
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