You may increase the speed if you are filling the same form repeatedely with
AcroFields.setFieldCache() and the copying constructor of PdfReader, see
http://1t3xt.info/examples/browse/?page=example&id=249.
Paulo
________________________________
From: Azùa Giovanni (KSXD 32) [[email protected]]
Sent: Tuesday, April 20, 2010 2:54 PM
To: Post all your questions about iText here
Subject: Re: [iText-questions] performance question
Hello Paulo,
I am perfectly aware of the benefits of iText, that's why I proposed it for our
project in the first place but it can be hard to convince the team lead and
colleagues to switch to a framework when it comes at a performance toll of 30%
overhead for the use-case at hand.
I didn't mean to start a flame but was actually fishing for rewrite
alternatives to improve the performance of our use-case ...
Best regards,
Giovanni
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________________________________
From: Paulo Soares [mailto:[email protected]]
Sent: Tuesday, April 20, 2010 2:48 PM
To: Post all your questions about iText here
Subject: Re: [iText-questions] performance question
Hmm, there are lies, damn lies and statistics. While I don't dispute the 30%
let's see the probable causes for this:
- iText tries to do things correctly avoiding to cut corners that will come and
bite your later. Metadata writing, appearance generation and so on.
- iText is a generic PDF library. It reads, writes and modifies PDFs. Any
library designed with a narrower purpose can optimize the interested areas to
perform better.
- iText comes with source and can be extended, modified, altered. This implies
that a sensible and probably heavier structure must be in place to allow that.
If you have a closed source library with just a single purpose things can be
done faster as that's all it's going to do.
- com.itextpdf.text.pdf.PdfStamperImpl.close() is where everything is written
to file, if you avoid calling this nothing will come out.
- There are some speed and memory improvements in the pipeline but I don't know
how much % improvement will result or in what areas.
Paulo
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