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speed up label_nodes by sharing dictionary lookups #3

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Nov 28, 2021
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speed up label_nodes by sharing dictionary lookups #3

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9 changes: 6 additions & 3 deletions src/dags.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -270,9 +270,12 @@ Assign an integer label to each circuit node, bottom up, starting at `1`
function label_nodes(root::DAG)
labeling = Dict{DAG,Int}()
i = 0
foreach(root) do node
labeling[node] = (i+=1)
end
f_inner(n, call) = begin
foreach(call, children(n))
(i += 1)
end
f_leaf(n) = (i += 1)
foldup(root, f_leaf, f_inner, Int, labeling)
labeling
end

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