Hacktoberfestgood first issuehashingperformance
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説明
In the following code, I construct a large deeply nested DAG and then call objectid on the root node. I'm expecting this to be instant, but instead the call to objectid takes time proportional to the size of the data structure. With the size 100 used below it probably won't return ever.
struct Foo
x::Any
y::Any
end
function test()
foo = Foo(nothing, nothing)
for i in 1:100
foo = Foo(foo, foo)
end
println(1)
println(objectid(foo))
println(2)
end
test()
Version info:
julia> versioninfo()
Julia Version 1.7.0
Commit 3bf9d17731 (2021-11-30 12:12 UTC)
Platform Info:
OS: Linux (x86_64-pc-linux-gnu)
CPU: Intel(R) Core(TM) i5-5300U CPU @ 2.30GHz
WORD_SIZE: 64
LIBM: libopenlibm
LLVM: libLLVM-12.0.1 (ORCJIT, broadwell)