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[Utilities] use foldl to avoid StackOverflow #2290

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merged 4 commits into from
Sep 24, 2023
Merged

[Utilities] use foldl to avoid StackOverflow #2290

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621dc97
Use afoldl to avoid StackOverflow
blegat Sep 23, 2023
a8dc447
Add comment
blegat Sep 23, 2023
c5350a7
Fix closure perf
blegat Sep 23, 2023
8b1d047
Switch to public foldl function
odow Sep 24, 2023
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17 changes: 5 additions & 12 deletions src/Utilities/operate.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -323,12 +323,7 @@ end
### 1c: operate(+, T, args...)

function operate(::typeof(+), ::Type{T}, f, g, h, args...) where {T<:Number}
ret = operate(+, T, f, g)
ret = operate!(+, T, ret, h)
for a in args
ret = operate!(+, T, ret, a)
end
return ret
return operate!(+, T, operate(+, T, f, g), h, args...)
end

### 2a: operate(::typeof(-), ::Type{T}, ::F)
Expand Down Expand Up @@ -1173,12 +1168,10 @@ end
### 1c: operate!(+, T, args...)

function operate!(::typeof(+), ::Type{T}, f, g, h, args...) where {T<:Number}
ret = operate!(+, T, f, g)
ret = operate!(+, T, ret, h)
for a in args
ret = operate!(+, T, ret, a)
end
return ret
# In order to improve performance and avoid a `StackOverflow` if there are
# too many arguments, `foldl` does not do recursion and fall back to a
# `for` loop if there are too many arguments.
return foldl((x, y) -> operate!(+, T, x, y), (f, g, h, args...))
end

### 2a: operate!(::typeof(-), ::Type{T}, ::F)
Expand Down
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