With Revise 3.13.0 julia takes several seconds to exit()

[lmiq]

I observed the same in MacOS and Linux. Just do:

% julia --startup-file=no

julia> ] activate --temp

julia> ] add Revise

julia> using Revise

julia> exit()

Julia takes several seconds to exit (same with Control-D).

This is with Julia 1.12.3

[aviatesk]

Just for reference, this comes from the code that precomputes the field types cache in __init__ to improve the latency of the first struct revision:

Revise.jl/src/packagedef.jl

Lines 1656 to 1667 in e235ebf

	# Populate field types map cache (only on main process, not on workers)
	if __bpart__ && (isnothing(distributed_module) || distributed_module.myid() == 1)
	Threads.@spawn :default @lock types_cache_lock for type in collect_all_subtypes(Any)
	nflds = Base.Compiler.fieldcount_noerror(type)
	if nflds !== nothing && nflds > 0
	types = collect(Any, fieldtypes(type))
	else
	types = nothing
	end
	types_cache[type] = types
	end
	end

[c42f]

I just noticed this too. It takes around 30s on my machine with Revise 3.13. Which is a really long time 😅

$ time julia +nightly --startup-file=no -e 'using Revise; exit()'

real	0m32.094s
user	0m31.708s
sys	0m0.539s

The problem is that the cache thread never calls yield() so doesn't notice if the main task exits. Fix incoming

[justinmimbs]

Thanks for jumping on a fix @c42f! (Exit takes ~30 s on my machine too.)

In the meantime, to keep fast-running scripts fast, I updated my startup.jl as below. (In case it's useful to others coming across this.)

if isinteractive()
    using Revise
end