Thank you Thomas, for the quick response. I was trying not to sound like it was a complaint, but rather looking for any ideas for an unusual case. For example, you may have given me one:
> All threads, in your case two, have to share the PDFDoc, Catalog, XRef-table > and inputstream, > so yes, of course there are a lot of mutex locks, especially when a lot of > objects are shared > between the pages. I may be able to set up a test, and create multiple instances of the PDF doc itself. These are not huge, and I think memory will not be a constraint, and I am not writing to the documents. With completely separate document instances, I assume the rendering might proceed unimpeded in each thread. My real goal is to get two pages displayed as fast as I can. From that point on there's lots of "person think time" available to render in background. > So I guess that in your case a lot of time is needed in parsing the PDF > objects and not so >much in rendering them. That's actually a bit of my bafflement as well. Mostly these are PDF documents that contain nothing at all except one image per page - no text, no annotations. I take X TIFF's in photoshop, and produce an X page PDF. So really it should be spending very little time parsing. Which... maybe... is also worth looking at. Maybe instead of rendering a page, I can just pull out the image element and treat it independently. I'll dummy up a test run and see how much of the Pi's long rendering time is dealing with the image itself. I used PDF (vs a bunch of page images) because I may also want, eventually, to use music sheets rendered as PDF's by notation software, where each note and staff becomes a separate element. So just letting Poppler do all the work is very attractive rather than me looking under the covers. But it may be worth a quick trial run. Thanks again for the response. I was hunting for ideas to try, and you have given me some. Linwood _______________________________________________ poppler mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/poppler
