Open userrand opened 1 year ago
I can not seem to understand what causes this with this package. I tried with the other package in this link: https://mathematica.stackexchange.com/a/4093/86543 and it works as would be expected. I don't understand why this package crashes before converting the lazy list to a list. Only the head should have been computed which is not very memory expensive.
Maybe I should note that I do get some unexpected crashes with Mathematica 13.1 on Linux for seemingly not too difficult tasks and perhaps this is related to one of the weird crashes I get.
Hi. I just wanted to quickly respond that I was on holidays. I'll try to look into this sometime soon when the holiday backlog clears a little :)
Hello,
Ok thank you for the notice (: .
Hmmm, well I know my code isn't ideal in all ways and maybe it over-relies on having a high $IterationLimit
. Try setting lazyLists`Private`$lazyIterationLimit
to some finite number and see if that at least resolves the crash.
Other than that, I'll need to see a minimal example to even begin to debug this problem.
Oh, and I've also not really updated the main branch in a while but I have tinkered a bit. You can try checking out sjoerds/Development
and loading the code from the workspace (using the code at the top of the main notebook) to see if the more recent changes are of any help.
Thank you for this very nice code with a very nice documentation.
Short version: The kernel crashes when using intensive computations with
Map
and a recursive function.Further details:
I tried using this in a symbolic calculation where I compute Wick contractions or in other words compute correlations of random variables with a Gaussian distribution.
The multivariate random distribution has a symbolic covariance matrix A[i,j].
I split a sum of 10 terms into a list of sums of 2 or 3 terms. Each sum is averaged over by multivariate Gaussian integration with a symbolic matrix covariance matrix.
A given term can involve a product of 14 random variables which can require significant computation but it works quickly (like around 3 seconds) when using normal lists on this small example.
If I use the lazyLists here rather than regular lists Mathematica crashes.
If needed I can provide the code for the Gaussian integration and the test example but the code for the Gaussian integration adapted to my notation choices is rather lengthy.