PDFs with a large number of pages open very slowly

ID: 1624077649

Zotero is always very laggy when opening PDFs of more than 300 pages. Is there any way to solve it?

  • Please send an example PDF to support@zotero.org with a link to this thread.
  • Thank you for your reply! Already sent the email.
  • I suppose it depends on file size but I often open large PDF's (600 pages) and it works very fast (and am loving the new reader and tabs!)
  • We can reproduce the issue. Something in the PDF pages is significantly affecting rendering performance. The issue will be fixed later this year when we upgrade our underlying libraries.
  • Some pdfs can be open very fast others maybe never. Zotero open a 390 mb pdf that has 1645 pages in 3 seconds, but it can't open some searchable or scanned pdf files of 600mb or 800mb that have 200 pages. It stucks at 'loading' and nothing happens. But it also open a searchable pdf of 715mb that has 580 pages.
  • @martynas_b
    Thank you very much for your reply!
    look forward to the new versions.
  • edited November 24, 2022
    I have a 935 MB pdf that has 593 pages and Zotero can't open it even after 3 hours of waiting.
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