Hi Ludo, On Fri, 29 Nov 2019 at 17:19, Ludovic Courtès wrote: > Pro tip: just run I think that I have already did the pro tip. :-) --8<---------------cut here---------------end--------------->8--- diffoscope /gnu/store/s2vj70fgv4v4wq66dbi797ss15f8xd3b-julia-1.1.1{,-check}/lib/julia/sys.so \ > /tmp/sys.diffoscope du -sh /tmp/sys.diffoscope 845M /tmp/sys.diffoscope --8<---------------cut here---------------end--------------->8--- Maybe I am doing incorrectly... If I understand well [1], the file .ji are "precompiled" (analogy: .pyc). Hum?! [1] https://docs.julialang.org/en/v1/devdocs/sysimg/ Cheers, simon