On Friday, February 05, 2016 05:24:04 PM Nitin Arora wrote:
> Thanks Tim, this is very useful. I will probably use CartesianRange now.
>
> Is Julia 0.5 Arraypocalypse planning to address this issue as well ?
I don't think there's a way to solve this by changing our implementation of
views; I think it's more of a compiler issue, and the fact that
julia> isbits(CartesianRange((3,5)))
true
julia> immutable ArrayWrapper{M}
data::M
end
julia> z = rand(5,5);
julia> isbits(ArrayWrapper(z))
false
Since I don't work on the compiler, I can't speak for what's going to happen
there, but I'd be surprised if this changes in 0.5.
Best,
--Tim
>
> thanks,
> Nitin
>
> On Friday, February 5, 2016 at 3:24:34 PM UTC-8, Tim Holy wrote:
> > On Friday, February 05, 2016 08:17:21 AM Kevin Squire wrote:
> > > I think this needs to be @time bar(A).
> >
> > Yeah, sorry for the typo.
> >
> > > I get
> > >
> > > julia> @time bar(A)
> > >
> > > 0.000269 seconds (5 allocations: 176 bytes)
> > >
> > > 20010.937886591404
> >
> > That's just REPL allocation. Since A has 10000 columns, if this strategy
> > were
> > allocating you'd expect "10000+n allocations," where n comes from the
> > REPL.
> >
> > --Tim
