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Re: [Matplotlib-users] Accelerating PDF saved plots
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From: Eric F. <ef...@ha...> - 2012-07-08 06:20:52
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On 2012/07/07 7:14 PM, Michiel de Hoon wrote: > Hi, > > > What kind of outputs can these backends create? > > The Mac OS X backend can create PDFs, but it simply uses the pdf backend > to do so, so that wouldn't help you. > The cairo backend can create PDFs by using cairo, so that could be worth > trying. > > > Could make a simple speed comparison between these backends > > and the original script that uses the PDF backend. > > That would be useful, but keep in mind that there would be three options > to compare: > 1) The current PDF backend; > 2) A modified PDF backend; > 3) The cairo backend creating PDFs. > Since we don't have 2) yet, we cannot do the full comparison yet, but > still it would be good to know if it is faster to create PDFs by using > cairo compared to the current PDF backend. > > > I am assuming the changes you mention require quite some work > > to make the PDFbackend running faster. > > I think it is not so bad, since it's mainly a matter of removing the > stuff from the PDF backend that is no longer needed. Do we have a > maintainer for the PDF backend? Because I would rather rely on him/her > to make the changes to this backend. Otherwise, I can give it a try, but > probably I won't be able to find the time for it within this month. > It would be a good idea to enter a Github ticket for this, referring to this email thread. Mike D. and Jouni S. have done most of the work on the pdf backend. Eric > Best, > -Michiel. > > > > --- On *Sat, 7/7/12, Gökhan Sever /<gok...@gm...>/* wrote: > > > From: Gökhan Sever <gok...@gm...> > Subject: Re: [Matplotlib-users] Accelerating PDF saved plots > To: "Michiel de Hoon" <mjl...@ya...> > Cc: mat...@li... > Date: Saturday, July 7, 2012, 9:05 PM > > Hi, > > What kind of outputs can these backends create? I don't use MAC, so > my question is particularly for the Cairo backend. Could make a > simple speed comparison between these backends and the original > script that uses the PDF backend. I am assuming the changes you > mention require quite some work to make the PDFbackend running faster. > > Thanks. > > On Sat, Jul 7, 2012 at 9:40 AM, Michiel de Hoon <mjl...@ya... > </mc/compose?to=mjl...@ya...>> wrote: > > One reason behind the lengthy plot creation times is likely the > PDF backend itself. > > Whereas the Mac OS X and the Cairo backends make use of new_gc > and gc.restore to keep track of the graphics context, the PDF > backend uses check_gc and an internal stack of graphics > contexts. Since nowadays matplotlib has gc.restore > functionality, I don't think that that is needed any more. > > See this revision for when gc.restore was added to matplotlib: > > http://matplotlib.svn.sourceforge.net/viewvc/matplotlib?view=revision&revision=7112 > > In the same revision the Mac OS X and Cairo backends were > modified to make use of gc.restore. The PDF backend (and the > postscript backend also, btw) can be simplified in the same way > to speed up these backends, as well as to reduce the output file > sizes. > > Best, > -Michiel. > > --- On *Thu, 7/5/12, Gökhan Sever /<gok...@gm... > </mc/compose?to=gok...@gm...>>/* wrote: > > > From: Gökhan Sever <gok...@gm... > </mc/compose?to=gok...@gm...>> > Subject: Re: [Matplotlib-users] Accelerating PDF saved plots > To: "Benjamin Root" <ben...@ou... > </mc/compose?to=ben...@ou...>> > Cc: mat...@li... > </mc/compose?to=mat...@li...> > Date: Thursday, July 5, 2012, 2:11 PM > > > > 38 * 16 = 608 > 80 / 608 = 0.1316 seconds per plot > > At this point, I doubt you are going to get much more > speed-ups. Glad to be of help! > > Fabrice -- Good suggestion! I should have thought of > that given how much I use that technique in doing animation. > > Ben Root > > > I am including profiled runs for the records --only first 10 > lines to keep e-mail shorter. Total times are longer > comparing to the raw run -p executions. I believe profiled > run has its own call overhead. > > I1 run -p test_speed.py > 171889738 function calls (169109959 primitive calls) in > 374.311 seconds > > Ordered by: internal time > > ncalls tottime percall cumtime percall > filename:lineno(function) > 4548012 34.583 0.000 34.583 0.000 > {numpy.core.multiarray.array} > 1778401 21.012 0.000 46.227 0.000 > path.py:86(__init__) > 521816 17.844 0.000 17.844 0.000 > artist.py:74(__init__) > 2947090 15.432 0.000 15.432 0.000 > weakref.py:243(__init__) > 1778401 9.515 0.000 9.515 0.000 {method 'all' > of 'numpy.ndarray' objects} > 13691669 8.654 0.000 8.654 0.000 {getattr} > 1085280 8.550 0.000 17.629 0.000 > core.py:2749(_update_from) > 1299904 7.809 0.000 76.060 0.000 > markers.py:115(_recache) > 38 7.378 0.194 7.378 0.194 {gc.collect} > 13564851 6.768 0.000 6.768 0.000 {isinstance} > > > > > I1 run -p test_speed3.py > 61658708 function calls (60685172 primitive calls) in > 100.934 seconds > > Ordered by: internal time > > ncalls tottime percall cumtime percall > filename:lineno(function) > 937414 6.638 0.000 6.638 0.000 > {numpy.core.multiarray.array} > 374227 4.377 0.000 7.500 0.000 > path.py:198(iter_segments) > 6974613 3.866 0.000 3.866 0.000 {getattr} > 542640 3.809 0.000 7.900 0.000 > core.py:2749(_update_from) > 141361 3.665 0.000 7.136 0.000 > transforms.py:99(invalidate) > 324688/161136 2.780 0.000 27.747 0.000 > transforms.py:1729(transform) > 64448 2.753 0.000 64.921 0.001 > lines.py:463(draw) > 231195 2.748 0.000 7.072 0.000 > path.py:86(__init__) > 684970/679449 2.679 0.000 3.888 0.000 > backend_pdf.py:128(pdfRepr) > 67526 2.651 0.000 7.522 0.000 > backend_pdf.py:1226(pathOperations) > > > > -- > Gökhan > > -----Inline Attachment Follows----- > > > ------------------------------------------------------------------------------ > Live Security Virtual Conference > Exclusive live event will cover all the ways today's > security and > threat landscape has changed and how IT managers can > respond. Discussions > will include endpoint security, mobile security and the > latest in malware > threats. > http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ > > -----Inline Attachment Follows----- > > > _______________________________________________ > Matplotlib-users mailing list > Mat...@li... > <http://mc/compose?to=Mat...@li...> > https://lists.sourceforge.net/lists/listinfo/matplotlib-users > > > > > -- > Gökhan > > > > ------------------------------------------------------------------------------ > Live Security Virtual Conference > Exclusive live event will cover all the ways today's security and > threat landscape has changed and how IT managers can respond. Discussions > will include endpoint security, mobile security and the latest in malware > threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ > > > > _______________________________________________ > Matplotlib-users mailing list > Mat...@li... > https://lists.sourceforge.net/lists/listinfo/matplotlib-users > |