I manage to remove LinearAlgebra from the sysimage. It reduces the size of the julia installation folder and seems to improve the startup time. LinearAlgebra can still be used as normal, so I am not sure why it has not been removed from the sysimage yet?
Regarding upx, it did not work for me on windows, however “strip” worked well on all the dll in the bin folder as well as the sysimage.dll and haven’t notice any negative effect. I was wondering if anyone else tested that?
In total I manage to reduce Julia 1.13 size down from 1.1G to 850M.