Debenu Quick PDF Library - PDF SDK Community Forum : Performance when adding text elements http://www.quickpdf.org/forum/ Copyright (c) 2006-2013 Web Wiz Forums - All Rights Reserved. Mon, 04 May 2026 11:10:55 +0000 Thu, 07 Jan 2016 20:49:26 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 11.01 360 www.quickpdf.org/forum/RSS_post_feed.asp?TID=3240 <![CDATA[Debenu Quick PDF Library - PDF SDK Community Forum]]> http://www.quickpdf.org/forum/forum_images/QPDF_Forum_Title.png http://www.quickpdf.org/forum/ <![CDATA[Performance when adding text elements : Hi Michael,do you think it&#039;s...]]> http://www.quickpdf.org/forum/performance-when-adding-text-elements_topic3240_post12909.html#12909 Author: Ingo
Subject: 3240
Posted: 07 Jan 16 at 8:49PM

Hi Michael,

do you think it's faster to do the first two steps instead of using an easy LoadFromFile (into memory as well)?
The same for the last step: An easy SaveToFile should be faster.
But all this saves time at the beginning and at the end. Most of the time will be consumed while working on the pages.
Here's a sample from the Debenu-knowledgebase about watermarking. If you do it the same way i fear there's no further time save option:
http://www.debenu.com/kb/programmatically-add-watermark-stamp-pdf/

BTW: A 100-mb-file on disk could be a much bigger file if it's loaded and structured into the memory.

Cheers and welcome here,
Ingo



Edited by Ingo - 07 Jan 16 at 8:52PM]]> Thu, 07 Jan 2016 20:49:26 +0000 http://www.quickpdf.org/forum/performance-when-adding-text-elements_topic3240_post12909.html#12909 <![CDATA[Performance when adding text elements : Hello, I have to &#034;watermark&#034;...]]> http://www.quickpdf.org/forum/performance-when-adding-text-elements_topic3240_post12901.html#12901 Author: x3mike
Subject: 3240
Posted: 04 Jan 16 at 4:54PM

Hello,

I have to "watermark" existing PDF documents with some text elements. The process take a really long time.

For some tests I used this document I googled in the internet: http://scholar.princeton.edu/angelab/publications/super-large-pdf-100mb

What I do:
  • create TMemoryStream and load the data into it
  • create a TQuickPDF instance and load the document from the memorystream
  • Iterate each page, select it and add two text elements
  • save the document back to the stream and save the stream to a file

On my machine this process takes 80 seconds!

How can I speed up the process? This kind of PDF-processing is used on a WebServer which dynamically adds user data to the delivered PDF. A processing time of average 40seconds totally blocks the server ...

Thank you for your help!

Best regards,
Michael

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