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slow unidimensional circshift on dense (small) vectors #30336

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slow unidimensional circshift on dense (small) vectors #30336

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5 changes: 4 additions & 1 deletion base/multidimensional.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -932,7 +932,10 @@ See also [`circshift`](@ref).
axes(dest) == inds || throw(ArgumentError("indices of src and dest must match (got $inds and $(axes(dest)))"))
_circshift!(dest, (), src, (), inds, fill_to_length(shiftamt, 0, Val(N)))
end
circshift!(dest::AbstractArray, src, shiftamt) = circshift!(dest, src, (shiftamt...,))

_circshift_helper!(dest::AbstractArray, src, shiftamt) = circshift!(dest, src, (shiftamt...,))
_circshift_helper!(dest::AbstractArray, src, shiftamt::Integer) = circshift!(dest, src, (shiftamt,))
circshift!(dest::AbstractArray, src, shiftamt) = _circshift_helper!(dest, src, shiftamt)

# For each dimension, we copy the first half of src to the second half
# of dest, and the second half of src to the first half of dest. This
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