[Bug 1590804] Re: fontconfig initialization spends most of its time parsing XML configuration files in /etc/fonts/conf.d/

[Alberto Aguirre]

So actually, fontconfig does not cache conf files at all... it caches
fonts but not conf files...

fontconfg needs support to also cache the result of the parsing of the
xml config file parsing. It seems a low priority effort for less than a
35ms improvement in startup.

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Title:
  fontconfig initialization spends most of its time parsing XML
  configuration files in /etc/fonts/conf.d/

Status in Canonical System Image:
  In Progress
Status in fontconfig package in Ubuntu:
  New
Status in qtbase-opensource-src package in Ubuntu:
  Invalid

Bug description:
  While profiling the startup of QML apps on the BQ E4.5 phone (armhf) I noticed that a significant amount of time (around 35ms) was spent solely on parsing the XML configuration files in /etc/fonts/conf.d/ 
  There seems to be around 40 files on Ubuntu Phone in that directory.

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