I'm glad you got such good results.  I will try the process I proposed later this year.  The process I currently use only loads the fonts once, but copies a new instance of the form template multiple times, pre-pends a page number on each form field to give them unique names and then fills in the fields.  Performance suffers as the page count goes up so I think I could not use this method if the page count goes over 500.  Acrobat can copy the same logo or watermark on each page without appending it multiple times so I think making the form background like a logo or watermark should work similarly.

Thanks for posting the results of your further efforts.  It sounds like you have a very good process.

Jack

The reason for the constantly increasing pdf file size (as posted above) was my error NOT a fault with the dll library.  I was still adding some fonts for each page unnecessarily. My bad!

Correcting this has also improved the performance results - it now takes just 23 seconds verses the original 109 seconds - a reduction of 46 seconds (42%).

I am one happy chappie! 

Generating 100 identical pages using the code in the prior post produces pdf files that grow larger by 3KB per file. ie first pdf generated is 625 KB and the 100th pdf generated is 940 KB!

There is a wee problem in the pdf library so the revised code, that WORKS is:

The library seems not to correctly handle deleting a page if the only other page has not been 'touched'. Hence the code rework.

Using my original code (a new pdf instance for every invoice) it took 69 seconds for 100 pages.

Using the above code it now takes 29 seconds - 40 seconds saving.

Interestingly, the individual pdf file sizes are larger! 635KB under the old method and 880KB under the new faster method. No visible difference in the output and same compression etc used.

Will try and figure out why!

Cheers

I should have said "as many references" of that page rather than copies.  I think the visual forms are  created inside the PDF viewer as needed sort of like calling a subroutine.

Jack

I would like to have tried out this solution so I could tell you that it works.  I have to print a lot of forms at the end of the year and the file size gets pretty big when I do.  When I get the time, what I intend to do is create one page that has the form background on it and then Clone that page with the function that comes with the Delphi version of the library listed in the reference guide as:

Jack

Hi folks,

A number of fonts are used so at present I create a pdf instance, add the fonts, generate the single page, saveToFile and delete the pdf instance! Repeating the process for every invoice.

Is there a mechanism that would allow me to just have a single pdf instance and thus only have to add the fonts once?

It seems that if I use the Document capability, I still have to add the fonts each time.

Many thanks.

Cheers.