[gs-bugs] [Bug 691317] New: significant perf regression due to calling blendmaskover for every pdf_grestore

bugzilla-daemon at ghostscript.com bugzilla-daemon at ghostscript.com
Tue May 18 12:52:05 UTC 2010


http://bugs.ghostscript.com/show_bug.cgi?id=691317

           Summary: significant perf regression due to calling
                    blendmaskover for every pdf_grestore
           Product: MuPDF
           Version: unspecified
          Platform: PC
               URL: http://code.google.com/p/sumatrapdf/issues/detail?id=9
                    30
        OS/Version: Windows 7
            Status: NEW
          Severity: normal
          Priority: P4
         Component: mupdf
        AssignedTo: tor.andersson at artifex.com
        ReportedBy: zeniko at gmail.com
         QAContact: gs-bugs at ghostscript.com
   Estimated Hours: 0.0


The document at the URL renders *very* slowly since the no-tree rewriting.
Profiling shows that most of the time is spent in duff_4i1o1 (called from
pdf_grestore -> fz_drawpopclip -> blendmaskover).

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