Allocation regression when iterating over Adjoint of Matrix #971
Closed
Description
Ref: https://discourse.julialang.org/t/allocations-again/90780/13
António Araújo noted the following, which started happening sometime between v1.8.1 and v1.8.3
using BenchmarkTools
function test(x, Y)
sum!(x, Y')
return nothing
end
x = rand(Float64, 100)
Y = rand(Float64, 1, 100)julia> @btime(test($x, $Y))
301.619 ns (2 allocations: 96 bytes)In v1.8.0 and v1.8.1 we have instead
julia> @btime(test($x, $Y))
68.719 ns (0 allocations: 0 bytes)
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