PackageCompiler hangs while compiling nonincremental system image on Julia v1.11

General Usage
38

Is this really true? I can imagine 1.11 being slower in itself, but I don’t think anything in the PackageCompiler process should use threads (except a part of the very last step in outputting the sysimage and I am not sure that even uses the number of julia threads). If you turn off threading, does 1.10 also become 40% slower?

Could you explain what part of PackageCompiler you think gets faster with your threads environment variable?

I just tested myself and didn’t notice a difference (on 1.10):

# Without threads
julia> using PackageCompiler

julia> ENV["JULIA_NUM_THREADS"]
"1"

julia> Threads.nthreads()
1

julia> @time create_app("examples/MyApp", "MyAppCompiled"; force=true)
...
150.910366 seconds (1.92 M allocations: 151.919 MiB, 0.01% gc time, 0.28% compilation time)

# With threads
julia> using PackageCompiler

julia> ENV["JULIA_NUM_THREADS"]
"10"

julia> Threads.nthreads()
10

julia> @time create_app("examples/MyApp", "MyAppCompiled"; force=true)
...
148.749071 seconds (3.82 M allocations: 291.721 MiB, 0.03% gc time, 0.28% compilation time)
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