[Poppler-bugs] [Bug 66938] New: poppler doesn't cache heavy objects

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=66938

          Priority: medium
            Bug ID: 66938
          Assignee: poppler-bugs at lists.freedesktop.org
           Summary: poppler doesn't cache heavy objects
          Severity: normal
    Classification: Unclassified
                OS: Windows (All)
          Reporter: pignatoff at mail.ru
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: unspecified
         Component: general
           Product: poppler

When displaying huge pages they are usually rendered piece by piece using calls
to the page_renderer::render_page() with appropriately calculated resolution
and coordinates. When for example a pdf-page contains a huge jpeg 2000 imgage
it can take several dozens of seconds to render. It seems it because on every
render poppler restores a bitmap for this jpeg 2000 from scratch. As a result,
when the viewer which renders big pages piece by piece spends dozens of seconds
on every page scroll.

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