> On 18 Mar 2016, at 12:01, Stahle, Patrick <[email protected]> wrote:
>
> Hi all,
>
> I am running into a lot of strange performance issues with certain PDF files.
>
> Background info:
> The strange thing I can't reproduce this consistently. When I get a pdf being
> generated on a particular environment it seems consistent. I do most of my
> development inside VirtualBox virtual machine running fedora. These pdf files
> I am having problems with never have performance issues when run on my
> virtual machine local drive, but if I use a Virtual Box Shared drive as the
> source / destination for the PDF, I see the problem. Another co-worker
> working from pure windows environment experience the performance problem. We
> are also seeing the same issue on our dev solaris servers. The performance
> range can be quite drastic on one of our 3DPDF's (12meg) running on my local
> environment it can be opened, stamped with some text, encrypted, and saved in
> around 8 sec. Doing the same job pointing to a virtual box share drive or on
> our solaris server that same work will take minutes. On my coworkers windows
> environment it takes around 30 seconds. We really only reproduced this
> consistently on the 12m 3D PDF. I have a much smaller pdf (non 3d / convert
> from msoffice) that does show similar performance issue but the times range
> from 200ms local to 8 sec.
You need to isolate the problem, you’ve got too many variables to make any
sense of it all. Get a reproducible problem on one, non-virtualised JVM first.
— John
> The one thing I see in common between the 2 files is I see a lot of the
> following messages to the console:
> Using output from the 12m 3DPDF file:
> :
> :
> 1787 [main] DEBUG org.apache.pdfbox.pdfparser.PDFObjectStreamParser -
> parsed=COSObject{13166, 0}
>
> These messages seem to happen on the PDDocument.open and from what I can
> tell, I get 13,166 of these messages in this example PDF.
> The slowness does not happen until the following line:
> document.save(outputPDFStream);
>
> Other PDF's including some quite large I do not see this performance issue
> nor those log messages.
>
> I know this is not much to go on, I am working on seeing if I can isolate
> this down to something more concrete / reproducible point. But I thought I
> would send this out to see if anyone has any ideas or have seen issues
> similar to this? Suggestions?
>
> Thanks,
> Patrick
>
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