Adobe Community: Why do some PDFs take so long to load?

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1. Pat Willener,

Jul 20, 2012 8:53 PM in reply to axmann48

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I do not see that effect with the document you linked.

Do you open that doc in the browser, or with the external Adobe Reader?

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2. axmann48,

Jul 21, 2012 7:04 AM in reply to Pat Willener

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Both. I get very slow loading on this document in both the browser and the standalone program.

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3. axmann48,

Jul 29, 2012 8:22 PM in reply to axmann48

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Please help

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4. Claudio González,

Jul 29, 2012 9:12 PM in reply to axmann48

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I have just tried your link, and the file took less than one second to download...

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5. axmann48,

Jul 29, 2012 10:17 PM in reply to Claudio González

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You obviously didn't read my post at all. Go back and read it.

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6. Pat Willener,

Jul 29, 2012 11:55 PM in reply to axmann48

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Ok, maybe you need to provide some more information...

I have Adobe Reader 10.1.3 on Windows XP, using Firefox 14.0.1

When I click on the link you provided in your original post, I see the progress bar

for about 1 to 2 seconds, and then the entire document (33 pages) is completely downloaded on my computer. I can scroll up and down, jump to the last page and back - there is no delay whatsoever.

Maybe you have some limitations on your system that we don't know about?

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7. axmann48,

Jul 30, 2012 12:37 AM in reply to Pat Willener

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No problem, but it's quite obvious from my post that I didn't mean "the time it takes to download the file to my computer."

Anyhow, what information would you like me to provide?

Here's my DirectX diagnostics report: http://pastebin.com/qrDJXPyD

The phenomenon doesn't occur on PDFs that are vector text only. It seems to only occur on documents where the pages were scanned directly and just thrown into a PDF as images, or that document I provided in my original post which contains some decorative background on every page.

Also note that I experiece this phenomenon on both Adobe Reader in the browser, Adobe Reader standalone, Adobe Acrobat, and even Foxit's PDF Reader.

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8. Claudio González,

Jul 30, 2012 5:05 AM in reply to axmann48

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axmann48 wrote:

You obviously didn't read my post at all. Go back and read it.

Well, I did forget to add that, as Pat, I didn't notice any special delays when moving through the pages of that file.

Not feeling very friendly today?

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9. Pat Willener,

Jul 30, 2012 6:56 PM in reply to axmann48

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axmann48 wrote:

For some reason, when I read certain PDF files, when I scroll down, it will take it time to "catch up", and load the page.

I have viewed your doc again, this time on a very similar system as yours, both in the browser, as well as in the standalone Reader.

The interesting thing is that I did, this time, observe a small time lag when paginating through the document; something like about 0.1 sec - is that what you are seeing?

I really don't know why this is happening on Windows 7 x64, but not on the much older XP system.

On the other hand, that 0.1 sec lag does not bother me enough to investigate it any further. If the lag was longer, then I would perhaps start watching the process with ProcMon or similar, to find out what activities are causing the delays.

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Why do some PDFs take so long to load?

Jul 20, 2012 3:20 PM

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