Performance when adding text elements

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   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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x3mike Members Profile Find Members Posts Beginner Joined: 04 Jan 16 Status: Offline Points: 2	Post Options Post Reply Quote x3mike Report Post Thanks(0) Quote Reply Topic: Performance when adding text elements 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

Ingo Members Profile Find Members Posts Moderator Group Joined: 29 Oct 05 Status: Offline Points: 3524	Post Options Post Reply Quote Ingo Report Post Thanks(0) Quote Reply 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
	Cheers, Ingo