Tested this command on an another system and still got about 100s runtime.
/usr/bin/time -v /usr/lib/cups/filter/pdftoraster 99 manu sometitle 1 'PageSize=A4 output-format=apple-raster Resolution=600dpi' testdoc/test12.pdf > pdftorast.out
Tested this command on an another system and still got about 100s runtime.
/usr/bin/time -v /usr/lib/ cups/filter/ pdftoraster 99 manu sometitle 1 'PageSize=A4 output- format= apple-raster Resolution=600dpi' testdoc/test12.pdf > pdftorast.out