[Poppler-bugs] [Bug 20891] New: Unicode chart hashes render very slow

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=20891

           Summary: Unicode chart hashes render very slow
           Product: poppler
           Version: unspecified
          Platform: Other
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: general
        AssignedTo: poppler-bugs at lists.freedesktop.org
        ReportedBy: roozbeh at gmail.com
                CC: freedesktop at behdad.org


The hashes in the Unicode charts render very slow with evince. For example, see
the charts on page 5 or 11 of the following document:

http://www.dkuug.dk/jtc1/sc2/wg2/docs/n3580.pdf

Some pages may render fast based on pre-computation, but page down further, or
zoom in or out, and you will easily run into a delay.

It seems that these . I talked to the author of the software that generates the
charts, and he said he uses an OS hash or something like that for these hashes:
so these are not complicated glyphs.

The pages render very quickly on Acrobat reader.


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