This is a really simple problem, and I’m not sure if I’m missing anything obvious here, but why is the following operation allocating memory? B = Matrix{Float64}(10,10^5); @time for j=1:10^5,i=1:10 B[i,j] = 1.0 end 0.023271 seconds (994.89 k allocations: 15.181 MB, 7.25% gc time)

Spurious allocation?

yuyichao May 16, 2017, 4:18pm 2

Don’t benchmark in global scope.

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CSV Reading (rewrite in C?)