#build container docker build -t rubyvips . docker run -it -t rubyvips docker run -v /Users/const/develop/viennarb/rubyvips:/app -it -t rubyvips
#run and time rake /usr/bin/time -f "%U seconds %M kbs" rake viennarb:shrink_vips /usr/bin/time -f "%U seconds %M kbs" rake viennarb:shrink_magick
#create pyramid vips dzsave worldmap.jpg mydz --suffix .jpg[Q=90]