Ah. Yes.
Though I was only really interested initially in what happened with the
memory.
putting it in a let clause gives me
julia> let
@time c = [1,2]
sizeof(c)
@time for x in 30:39 push!(c, x) end
@time for x in 30:39 push!(c, x) end
@time for x in 30:39 push!(c, x) end
@time for x in 30:39 push!(c, x) end
sizeof(c)
end
elapsed time: 1.811e-6 seconds (64 bytes allocated)
elapsed time: 3.018e-6 seconds (256 bytes allocated)
elapsed time: 1.207e-6 seconds (288 bytes allocated)
elapsed time: 6.03e-7 seconds (0 bytes allocated)
elapsed time: 2.113e-6 seconds (640 bytes allocated)
336
with a difference only for the initial creation which is presumably the
global versus local difference.
On Friday, December 19, 2014 6:01:24 PM UTC, John Myles White wrote:
>
> Are you timing things in the global scope?
>
> -- John
>
> On Dec 19, 2014, at 1:00 PM, John Drummond <[email protected] <javascript:>>
> wrote:
>
> > For the following code (julia 0.3.3 in windows 7 ) I don't understand
> what the bytes allocated in @time means
> >
> > All I'm doing each time is adding 10 8 byte integers
> >
> > Thanks for any thoughts
> >
> > julia> @time c = [1,2]
> > elapsed time: 3.32e-6 seconds (144 bytes allocated)
> > 2-element Array{Int64,1}:
> > 1
> > 2
> >
> > julia> sizeof(c)
> > 16
> >
> >
> > julia> @time for x in 30:39 push!(c, x) end
> > elapsed time: 2.717e-6 seconds (256 bytes allocated)
> >
> > julia> @time for x in 30:39 push!(c, x) end
> > elapsed time: 2.717e-6 seconds (288 bytes allocated)
> >
> > julia> @time for x in 30:39 push!(c, x) end
> > elapsed time: 2.112e-6 seconds (0 bytes allocated)
> >
> > julia> @time for x in 30:39 push!(c, x) end
> > elapsed time: 3.321e-6 seconds (640 bytes allocated)
> >
> > julia> sizeof(c)
> > 336
>
>
