Performance of filling an array

[baggepinnen]

Looks kind of similar to

Possible inefficiency in randn!

I was confused in the previous post, sorry. That has nothing to do with simd: using Random broadcast_randn(x) = (x .= randn.()) inplace_randn(x) = randn!(x) function myrandn!(x) @inbounds @simd for i in eachindex(x) x[i] = randn() end x end function myrandn_nosimd!(x) @inbounds for i in eachindex(x) x[i] = randn() end x end x = zeros(10_000) @btime broadcast_randn($x); @btime inplace_randn($x); @btime myrandn!($x); @btime myrandn_nosimd!($x); is only…