Julia slower than Matlab & Python? No

[Tamas_Papp]

@Sijun

I’m curious why array indexing in Julia returns a copy by default rather than a view, unlike numpy.

See this discussion:

Surprised that broadcast does not use views?

I am using a simple broadcast expression, and getting a surprising (to me) result depending on whether I use views or not. #setup a = rand(UInt64, 1000, 1000) b = rand(UInt64, 1000, 1000) c = rand(UInt64, 1000); Doing a broadcast op without views: @benchmark $c .= $a[10,:] .& $b[:,10] BenchmarkTools.Trial: memory estimate: 15.88 KiB allocs estimate: 2 -------------- minimum time: 3.607 μs (0.00% GC) Doing the op when employing views is much faster: @benchmark $c .= (@view $a…

TL;DR: it is not always better in terms of performance.