Not sure, but two possibilities come to mind:
- I'm not sure it works with keyword functions. One way to check would be to
modify base to create an`svds_` function (note the underscore) that takes all
those parameters as regular arguments, and have `svds` call `svds_`. Then
precompile `Base.svd
I am a little bit confused when trying to add precompile for svds in
userimg.jl, since svds uses nsv as keyword arguments:
function svds{S}(X::S; nsv::Int = 6, ritzvec::Bool = true, tol::Float64 =
0.0, maxiter::Int = 1000)
hence, calling svds maybe looks like: svds(X, nsv = 2), where X is a spa
Thanks Tim, for the neat and patient explanation!
I did follow your tips, added my module to userimg.jl and precompile for
the svds. What I did wrong is, I put my precompile function in my scripts
rather than userimg.jl. Will try it again now.
Cheers,
Todd Leo
On Wednesday, February 25, 2015 a
Keep in mind that compilation involves multiple stages:
- parsing
- lowering
- type inference
- generation of LLVM IR
- generation of machine native code
Just because it gets built into julia does not mean it goes through all of
those steps for all possible data types (in fact, that's not even po
That's exactly how I understand, and I'm using 0.4, so Tim's suggestion
above won't work...I presume this is not related to the implementation of
svds, since other built-in functions also takes much more time and memory
on the first running:
julia> @time sprand(5,5,0.1)
elapsed time: 0.31490503
That's exactly how I understand, and I'm using 0.4, so Tim's suggestion
above won't work...I presume this is not related to the implementation of
svds, since other built-in functions also takes much more time and memory
on the first running:
julia> @time sprand(5,5,0.1)
elapsed time: 0.314905039 s
No need to precompile. svds was recently added to base - but it won't exist
in 0.3.
-viral
On Wednesday, February 25, 2015 at 12:32:09 PM UTC+5:30, Todd Leo wrote:
>
> Isn't svd/svds already included in base? Do I need to precompile them?
>
> On Saturday, February 7, 2015 at 3:48:50 AM UTC+8, Ti
Isn't svd/svds already included in base? Do I need to precompile them?
On Saturday, February 7, 2015 at 3:48:50 AM UTC+8, Tim Holy wrote:
>
> Since it allocates 120MB on the first call and only 9kB on the second, all
> that
> memory is just due to compilation.
>
> The only way I know to fix tha
Since it allocates 120MB on the first call and only 9kB on the second, all that
memory is just due to compilation.
The only way I know to fix that is to precompile some of the functions when you
build julia. If this is a big deal to you, consider adding your own custom
userimg.jl (and see base/
This is because the internal operations with svds are allocating new
vectors every iteration. This PR should address it, but needs to be
completed,
https://github.com/JuliaLang/julia/pull/7907
Also, array indexing giving views by default will also help here.
-viral
On Friday, February 6, 2015
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