Slow line draw speed
Printed From: Debenu Quick PDF Library - PDF SDK Community Forum
Category: For Users of the Library
Forum Name: I need help - I can help
Forum Description: Problems and solutions while programming with the Debenu Quick PDF Library and Debenu PDF Viewer SDK
URL: http://www.quickpdf.org/forum/forum_posts.asp?TID=3031
Printed Date: 05 May 24 at 11:05PM
Software Version: Web Wiz Forums 11.01 - http://www.webwizforums.com
Topic: Slow line draw speed
Posted By: matt2000
Subject: Slow line draw speed
Date Posted: 17 Dec 14 at 4:09PM
Hi,
We recently implemented a direct PDF save to our CAD package. The main reason was so we could get away from the PDF printer drivers, and some of our users wanted Layers maintained.
When compared to CutePDF and PDFill, the Debenu QuickPDF line draw is very slow.
Time trials drawing 120,000 lines:
Debenu DPLDrawLine : 130 seconds
PDFill : 3 seconds
CutePDF : 3.5 seconds
I'm using a very tight loop in my test - calling DebenuPDFLibraryDrawLine(instanceID, StartX, StartY, EndX, EndY); 120,000 times.
Is there anyway to speed it up? Getting a lot of complaints from our users.
Is there a DrawLines routine? I might be able to send it connected lines and eliminate the vast majority of calls.
Otherwise, the library is awesome.
Thanks,
Matt
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Replies:
Posted By: matt2000
Date Posted: 18 Dec 14 at 1:02PM
Update...I now collect connected lines and use the AddLineToPath/DrawPath method. This sped it up considerably. That fixes my immediate problem.
Andrew got back to me and mentioned passing a string contain functions codes to a stream (QP.SetContentStreamFromString). This looks promising, but I haven't found a spec on the codes or a sample project. Does someone have a link to a project or documentation?
Many thanks to Andrew at Debenu - great support.
Matt
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