I am experiencing the following while loading my configuration. REPO=http://www.smalltalkhub.com/mc/philippeback/HOWebStack/main ./pharo Pharo.image config $REPO ConfigurationOfHOWebStack --install=0.4 Everything loads fine. But: with a package-cache/ empty, the final image is: 44.452.060 with a changes file of: 10.831.877 with a primed package-cache (meaning, letting the mczs in place and starting with a fresh image), the final image is: 29.480.912 with a changes file of: 10.830.899 That's quite a huge difference. I tried again to be sure (fresh image and empty package-cache, then fresh image only) and, weirdly enough, even if the difference in size was the same, the sizes themselves weren't.the same... 44.446.152 - 10.830.899 29.986.284 - 10.831.543 Maybe that's due to a GC occurring differently between the two. But this gives the impression that one cannot load a base image, apply a configuration, and end up with the same image twice. Weird. Why is this difference so large in the first place ? Phil