CreateDerivatives and mini_magic

[ghost]

CreateDerivatives is really slow. I'm also seeing LOADS of mini_magick* and magick* temp files in /tmp. Uploading 17 PDFs took ages.

[ghost]

Tried this mini_magick config in `config\initializers\mini_magick.rb

config.cli = :imagemagick
config.timeout = 5 # oops five seconds!

was posix_spawn

See https://github.com/minimagick/minimagick

but not sure that made any difference

an alternative is VIPS (as per posts by jrochkind).

[ghost]

Fixed locally, consider moving to here.

Fix was to bypass minimagick for PDFs and just use imagemagick. VIPS would be even quicker but is not a standard Centos package.