Questions tagged [compile]
Questions about the generation and use of compiled functions using Compile.
717 questions
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Question About Possible Ver 14.0 Bug
All: I'm running the following code. It's coming up with a persistent bug that seems to be related to the graph and processing the information; see image. Any advice? This code works fine with Ver 13....
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Call Compiled Function in Python
How can I call a function made with Compile in Python, Is it possible to just save it using LibraryGenerateand call the ...
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Something faster than RandomReal and RandomInteger?
I am dealing with the code sequentially producing random numbers and using them further for some operations.
The code snippet looks like
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How can I return an empty list from FunctionCompile?
The following code is for solving a linear congruence of the form $ax=b \; (\mathrm{mod}\ m)$ using FunctionCompile.
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Strange behavior of numerical derivative inside a ParallelTable
I have observed something strange happening with the function ND[] from the package NumericalCalculus.
In particular, if I define a function G that returns the numerical derivative of a compiled ...
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How to speed up the n-th Laplacian or derivative of function?
We wish to solve for the multiple Laplacian of a function, and here we use sum of E-exponential functions as an example：
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Making faster extraction of table elements in Mathematica or beyond
Consider the following code:
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Unexpected behaviour from NMaximize optimising a stochastic function
I have a complicated function whose output contains noise. I'm interested in Using Differential Evolution via NMaximize to solve it. However, NMaximize appears to compile or somehow 'freeze' the ...
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Can't compile a standalone app in 14.1
I read the article reviewing the innovations in version 14.1 and am absolutely thrilled to be able to build a standalone app. I tried to replicate the example from the article in an even shorter form, ...
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Listable attribute for functions compiled with FunctionCompile
Is it possible to create Listable compiled code with FunctionCompile in the same way one may do with ...
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Compiler with CompilationTarget -> C appears broken in 14.1
On the same Windows 11 machine with the same C compiler (Visual Studio 2022):
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Way to run the script faster
I have a mathematica code, which is running fine, but it takes long time to evaluate.I have already modified the code with compilation and vectorization as you can see from my code.
May be its a ...
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Use of Compile[] to optimize the code to run faster
I am working on a code that takes long time to evaluate, So I come to know that use of Compile[] function can speed up significantly. Here is my original code.
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Qualitative question: can the code matching the given patterns be made significantly faster if being written in pure C?
I made some code in Mathematica that I compiled in C. It involves operations such as looping inside While, custom random sampling from particular distributions, and ...
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Parallelization with compile gives an error
I have this uncompiled code with MMA14, win10,64
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Compilation error for multidimensional lists [duplicate]
Dear Mathematica users,
I have a code as:
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94
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How to push the performance of this compiled function
I have the function optvals solving for two variables. For the given example of variables, I need the program to run atmost in a millisecond.
The main part of the ...
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How to speed up generating and filtering large lists of numbers?
I have the following code where I brute force search for two variables.
list gives a list of 3 dimensional vectors, say {x,y,z}. ...
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Why using compiled code inside compiled code may slow things down?
I made some code that I compiled. The snippet looks as follows:
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Why is random sampling with ordinary and compiled code so different?
Consider the following code:
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Compilation of the function that should return vector along with matrix [duplicate]
I am looking for the way how to compile the function that is supposed to return vectors along with matrices. The simplified example looks next:
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Fast sampling from Fermi-Dirac distribution under specific conditions
This question is a continuation of the following one.
Let us assume a Fermi-Dirac (FD) distribution (times $p^{2}$):
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How to quickly check if compiled code calls MainEvaluate?
Consider the following test compiled code:
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How to compile the following code (sampling from a distribution)?
Consider the following code:
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Problem compiling derivative of expression
I need to compile functions for an expression and its derivative and then pass these on to a precompiled worker loop for further processing. An If statment detects when the expression parameter expr ...
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Mathematica call CompiledFunction from Python with Listable and Parrallelization attributes
I have a CompiledFunction e.g. this:
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GSL multiroot finding mode Hybrid function load with Mathematica : Crash
Hi everyone
I work on a Mac M1 Sonoma 14.3 with Mathematica 12.3.1 and 14.0
I have an issue when using a C++ multiroot finding from GSL library.
I used this example : https://www.gnu.org/software/gsl/...
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Compiling an ItoProcess
I am a new mathematica user. I am trying to use the Compile command to speed up my RandomFunction output. The code looks like this:
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Compile does not boost the speed
I have these functions that are used to defineMyFun below
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How can we improve performance when passing data to a function?
I have a defined function $F(x,y,z)$ and data of $(x,y)$ and would like to evaluate the sum of F over data and at different z values. Here is a minimal example:
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Tensors of arbitrary rank inside compiler
I want to create a compiled function that executes operations with lists of tensors. It has two arguments, two lists of tensors, and takes the tensor products between tensors of both lists. Is it ...
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Compile constraints for NMinimize
I use complicated constraints for optimisation, something like
Table[
EuclideanDistance[pts[[i]], pts[[j]]] >= 1
, {i, numPts - 1}, {j, i + 1, numPts}]
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Issue with ReplaceAll resulting in Null function return
I am trying to modify some code of mine to change where the final evaluation of a function is performed, as a way to not generate massive tables of data. The code is working fine, until I have started ...
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How to Compile functions to C in parallel?
I need to Compile functions for use on parallel kernels. There are many such functions, so compiling in parallel is desirable. When compiling functions with ...
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Strategies and practical advice for using saved compiled functions in a package
I want to use a compiled function in a package without having to rebuild it each time. This slows down unit testing and loading of the package.
I have used the example in the link as my starting point:...
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When to use WVM instead of C for CompilationTarget?
In which cases is it advantageous to compile using the Wolfram Virtual Machine ("WVM") option rather than the C Code (...
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Optimizing memoization in compiled Mathematica code
Consider the following two codes - compiledcode and compiledcode1:
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Making speed of MemberQ comparable with explicit If?
Consider the following two lists:
listtest = {11, 13, 22, 221, 1, 3} // Sort // N;
pdglisttest = RandomInteger[{-222, 222}, 10^6] // N;
For the given element of <...
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Problem using Compile together with Eigensystem
I have been trying to understand what is wrong with this piece of Mathematica code:
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130
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How to quickly generate the values satisfying the given condition?
Consider some domains in variables th, z and some condition cond defining the domain of a ...
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What can be improved in the following custom bilinear interpolation?
Consider some test data: a grid of x, y, and values of some function on this grid:
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How to quickly sample points from the given PDF data?
Consider some data (distr.dat). It is a tabulated PDF: x, y, z, PDF[x,y,z], where x is some parameter (and the integral of ...
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How to make the function compile into C faster, and how to determine which portion of the code occupies more memory?
If changing the value of 'n' from 2 to 3 in the above code increases the compilation time from one minute to ten minutes, is there a way to speed it up? Also, the code consumes too much memory during ...
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Is there a faster way to compose a large number of random Gaussians?
I'm looking for a more efficient way to generate an image with a large number of randomly coloured Gaussians. Here's the code I'm using:
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How to use Compile to optimize the performance of a function calculating the distance between two points?
I want to create a function that finds the real space distance between two three-dimensional points. Each point is a list of three real numbers.
I can create functions ...
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Weird slowdown on data returned by compiled function (bug?)
Mathematica 13.1 - I was cleaning up some computations and I got a x3 time increase when I reduced things to loop over.
Full context is a bit convoluted, I stripped the most I could but the problem ...
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Can I use a C compiler from behind WSL?
I've got 13.3 on Windows 11 (22H2) and a gnu compiler suite under WSL2 (Arch). Seems it is possible to compile in Windows with VS Code (which I also have). Do I still need to install another C ...
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