Re: Another possible gb.poppler bug?

[gbWilly <gbWilly@xxxxxxxxxxxxxx>]

On Tuesday, December 2nd, 2025 at 20:14, Claus Dietrich <claus.dietrich@xxxxxxxxxx> wrote:
> A good question. It seems that XReader is written in C and Okular in
> C++. This might explain some of my observations but I would prefer to
> make some concrete tests to quantify some of the brake effects. The
> 1000-pages PDF as referenced by Gianluigi in his video would be a nice
> file to start with.

I can only agree with above. If I get my hands on a version I'll make sure you get one too. It's the attachment size limitation off the mailing list that prevents sending it on the ML.

We're no longer byte fucking like in the 80-ies when it comes to data storage and availability. But then again, it is probably free hosting and thus we should be glad there is at least that, which is understandable.

But privately I can send and receive big attachments, and so can you probably. It's a strange limitation with the immense amount of space hard drives offer these days.

>I feel comfortable with the speed of my PDF viewer
> and I don't want to compete with XReader or Okular. I developed it as a
> PDF viewer in one of my Gambas applications. It is supposed to display
> up to ~50 pages without embedded thumbnails, which is a piece of cake
> for it.

The PdfTest is an excerpt of a viewer I'm building for the second Gambas Learning guide. For me it works fine for the mostly max 150 paged documents I open. But my contributors (testers) started testing with big files and asking me 'why does this viewer opens it fast and yours doesn't?', hence the questions on could we be missing internal thumbnail retrieval in poppler, because I already understood that self rendering is a lot slower.

In my guide I start off with self rendering, to later go to internal loading, which appears to be seldom cases as you explained. I'm lucky (thanks to Gianluigi) to have a few pdf files with internal thumbnails, but I was not impressed by their appearance, but they load fast.

I myself am quite happy with my result, being it is for an educational purpose. All these loading enhancements make for great material in the guide, a perfect example on how moving code can make for faster results. So, I need to investigate as I love new discoveries and explorations, they make me grow.


gbWilly

GambOS
Gambas3 for Debian/Ubuntu

...there is always a Catch if things go wrong!