<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW --- - very slow render" href="https://bugs.freedesktop.org/show_bug.cgi?id=64892#c23">Comment # 23</a> on <a class="bz_bug_link bz_status_NEW " title="NEW --- - very slow render" href="https://bugs.freedesktop.org/show_bug.cgi?id=64892">bug 64892</a> from <a class="email" href="mailto:Thomas.Freitag@alfa.de" title="Thomas Freitag <Thomas.Freitag@alfa.de>"> Thomas Freitag</a> <pre>(In reply to <a href="show_bug.cgi?id=64892#c22">comment #22</a>) > Thomas the question about the delete line is if it belongs to the same > bugfix or not. I.e. if we were not going to commit this, do we still need > the delete? I understand we do, thus is part of a different bugfix. Yep. We need the delete in either case. > > I'll try to see why lcms is so slow, i think the lcms is being parsed all > the times for the tiling Seems to be important for You before testing my patch, therefore I made some tests by my own, here my results, hopefully You come to the same conclusion: with lcms2: time utils/pdftoppm -cropbox -png -r 72 -f 35 -l 35 zgewinne\ und\ Entlastungen\ öffentlicher\ Haushalte\ durch\ Public\ Private\ Partnership\ \(PPP\).cracked.pdf zgewinne real 0m16.479s user 0m16.321s sys 0m0.104s (so Your computer is faster than mine :-) ) with lcms1: time utils/pdftoppm -cropbox -png -r 72 -f 35 -l 35 zgewinne\ und\ Entlastungen\ öffentlicher\ Haushalte\ durch\ Public\ Private\ Partnership\ \(PPP\).cracked.pdf zgewinne real 0m4.424s user 0m4.332s sys 0m0.056s (that's what I expected because of the lcms discussion in the poppler community) Then I made a valgrind profile: We have 2639 calls of tilingPatternFill, where the tiling pattern contains an image in GfxIndexedColorSpace (parse of it is called 2639 times) which base colorspace is a GfxICCBasedColorSpace (parse of it is called 2640 times). And because this colorspace is not cached (not sure, if this is possible, I haven't looked into the PDF itself, but I can't believe that we really have 2639 different images with different colormaps), a new lcms transformation has to be constructed, and that costs the time. Kidding: isn't that another bug, too, and You're hijacking this bug :-) ? (Okay, okay, this behaviour makes the rendering slow, too!)</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> </ul> </body> </html>