Why is the size of PDF file generated by quickpdf

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I am a paid user of quick PDF library. I have found that the size of the generated PDF is significantly larger when I use "quick PDF library" to store PDF. For example, I use the following simple program to test. I open a 900K PDF with 10 pages, delete nine pages, and then save it. I find the generated PDF file(that has only one page) is larger than the original file, Is this a bug? 

Temp = myDoc.LoadFromFile(mypdf.pdf, 0)
myDoc.DeletePages 2, 9
myDoc.SaveToFile "myoutpdf.pdf"

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wangpeibing Members Profile Find Members Posts Beginner Joined: 31 Jul 20 Status: Offline Points: 3	Post Options Post Reply Quote wangpeibing Report Post Thanks(0) Quote Reply Topic: Why is the size of PDF file generated by quickpdf Posted: 31 Jul 20 at 3:34AM
	I am a paid user of quick PDF library. I have found that the size of the generated PDF is significantly larger when I use "quick PDF library" to store PDF. For example, I use the following simple program to test. I open a 900K PDF with 10 pages, delete nine pages, and then save it. I find the generated PDF file(that has only one page) is larger than the original file, Is this a bug? Temp = myDoc.LoadFromFile(mypdf.pdf, 0) myDoc.DeletePages 2, 9 myDoc.SaveToFile "myoutpdf.pdf"

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: 31 Jul 20 at 10:28PM
	Hi Wang, there are too many possible reasons for this behavior. Font file embedded or not... Where are the images... first compressed then with save not compressed... first optimized for web after save not... and so on... Please try the enhanced search (top, right here with the spy glass) with relevant keywords. You should read the online reference and the developer guide as well. Cheers and welcome here, Ingo
	Cheers, Ingo

wangpeibing Members Profile Find Members Posts Beginner Joined: 31 Jul 20 Status: Offline Points: 3	Post Options Post Reply Quote wangpeibing Report Post Thanks(0) Quote Reply Posted: 01 Aug 20 at 2:27PM
	Thank you for your reply. I tried to use all the following functions, but the generated file is still very large. If I do the same with Adobe Acrobat, the generated files are only a fraction of those generated with the quick PDF library myDoc.CompressContent myDoc.ReduceSize(0) myDoc.ReplaceFonts(0) myDoc.CompressFonts(0) myDoc.CompressImages(0)

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: 01 Aug 20 at 3:08PM
	The functions you've tried are working on the fonts and images you're embedding just in time - Not the ones which are already inside. You shouldn't compare QuickPDF with Acrobat or do you compare Mercedes Benz with Volkswagen as well? ;-) Have a look to the installation of QuickPDF with less mb and have a look on an Acrobat installation...
	Cheers, Ingo