[poppler] Anyone seeing poppler performance issues w/ fontconfig 2.12.1?

[Albert Astals Cid]

El dimecres, 24 d’agost de 2016, a les 17:12:18 CEST, Ed Porras va escriure:
> Hi everyone,
> 
> I wanted to check if anyone is noticing performance issues with
> poppler-based applications after upgrading to fontconfig 2.12.1. I’m seeing
> a significant hit with programs like diff-pdf when running it with the new
> version vs. the previously installed one:

Have you trying asking the fontconfig people? If it can be easily 
reproduceable with "widely" distro available stuff like pdffonts i guess it's 
something eaiser to test for them than for us.

Cheers,
  Albert

> 
> doppio:fontconfig_test admin$ time diff-pdf to_service4.pdf to_service4.pdf
> 
> real    0m23.053s
> user    0m19.796s
> sys     0m1.581s
> 
> doppio:fontconfig_test admin$ brew switch fontconfig 2.11.1
> Cleaning /usr/local/Cellar/fontconfig/2.11.1
> Cleaning /usr/local/Cellar/fontconfig/2.12.1
> 215 links created for /usr/local/Cellar/fontconfig/2.11.1
> 
> doppio:fontconfig_test admin$ time diff-pdf to_service4.pdf to_service4.pdf
> 
> real    0m0.218s
> user    0m0.106s
> sys     0m0.064s
> 
> 
> Also seeing it w/ pdffonts and pdftocairo. The PDF file is a single page
> 14kb file with five fonts (apologies for the different formatting):
> 
> ep at doppio ~/Desktop $ time  pdffonts edsel_runs/to_service4.pdf
> name                                 type              encoding         emb
> sub uni object ID ------------------------------------ -----------------
> ---------------- --- --- --- --------- DDFLBM+PSOwstdutchb                 
> Type 1C           Custom           yes yes no       8  0 DDFLCO+PSOsymclas 
>                   Type 1C           Custom           yes yes no      12  0
> Helvetica-Bold                       Type 1            Custom           no 
> no  no       9  0 Helvetica                            Type 1           
> Custom           no  no  no      10  0 Symbol                              
> Type 1            Custom           no  no  no      13  0
> 
> real	0m20.337s
> user	0m19.867s
> sys	0m0.414s
> 
> 
> I’ve used this file in my test suite for years and it’s always processed in
> less than a second plus it’s also happening with all other PDFs I have.
> 
> (On the other hand, pdftotext and pdftops process it quickly but I presume
> it’s because they’re not using FreeType to open the embedded fonts or not
> looking at the fonts at all).
> 
> I’m not finding reports of other people having the same problem but, perhaps
> it’s just something too fresh since home-brew just pushed the updated
> fontconfig. I don’t mind keeping fontconfig at 2.11.1 but I’d like to file
> an issue if this is happening to others and also try and track the cause.
> So far, I’ve tried:
> 
> * reinstalled a fresh home-brew to ensure there were no update problems.
> * several combinations of clearing & regenerating the font cache (system and
> user caches) and edits to config files in fontconfig/conf.d/*. * #if 0’d
> all freetype calls from my own source and removed freetype library from my
> makefile's linked lib list.
> 
> I’m going to see if I can reproduce the same on a linux box but I might need
> to build a VM one I can test upgrading fontconfig manually on if there are
> no updated deb packages made available. I’m also en-route to Berlin for the
> rest of the week so I might not get to this until next week depending on
> work.
> 
> Could someone confirm if anyone has noticed the same problem? Or if anyone
> has some insight as to what might be causing this, could you give some
> suggestions as to where I should look?
> 
> Thank you,
> 
> —
> Ed Porras
> Motologic / AAP
> ed at motologic.com