Questions tagged [compile]
Questions about the generation and use of compiled functions using Compile.
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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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FunctionCompile get IR source code
A new fancy option to compile WL's function using LLVM is amazing.
Is there any way to get the IR's (intermediate representation) representation of it?
According to specification there are two forms ...
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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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Compile vs FunctionCompile
I wanted to look at the pros & cons of Compile & FunctionCompile. This code below is from Neat Examples in FunctionCompile documentation.
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How can I know what prevents efficient lower level code when using FunctionCompile?
When using the old Compile, I can use CompilePrint and ensure the resulting CompiledFunction doesn't use MainEvaluate. If MainEvaluate isn't used, the CompiledFunction is efficient. How do we know if ...
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Performance of polynomial functions in Mathematica vs Python [closed]
I am trying to compare the performance of Mathematica vs Python for vectorized operations involving polynomials. The data is floatMatrix which has dimensions (...
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CompiledFunction fails for Variance with a rank 3 input
Why does compiling Variance for a rank 3 input fail but Mean works?
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Improve performance of Linear Optimization
EDIT
I am reframing the question here by pulling out the relevant part about linear optimization, you can find the original question and the entire code down below.
I am trying to increase the ...
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Using compile with indexed variables
I have the following piece of code which I made faster by using compile. I make the following definitions
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Using Indexed variables in Compile?
This follows a: useful post about Compile from about 10 years ago
In that post there is a comment:
You can not really use indexed variables in Compile, although it may appear that you can.
For ...
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How to compile a code with a table having varying number of columns?
Consider the following table:
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Numerical Error using compile
I'm trying to compile a function and I'm running into the following error
CompiledFunction::cfne : Numerical error encountered; proceeding with uncompiled evaluation.
I think I have succeeded in ...
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Defining a function using just compilable functions
I need to define a function that takes an input and if and only if its a positive real, outputs the input. If not, the output should be 0. The input could be complex valued or indeterminate.
Heres ...
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Performance improvements using Table and Compile
I'm converting a code from MatLab to Mathematica. It takes MatLab less than a second to compute it while its more than ten minutes in Mathematica. I was hoping to improve the performance.
Here's a ...
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Make a recursive function for computing a matrix faster
I have a function below called inverseKostkaHelper (see belos) which
I want to make faster.
It takes two integer partitions as arguments, (both with the same total ...
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Large Structured Programming with Compile
Is it possible or wise to build a large program structure with only Compile?
With FunctionCompile it is possible to create ...
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Why is the code with multiple Do slower than the one without them, and why is For faster than Do?
For some table tab having N rows and n columns, I need to go over all its rows $j$ and ...
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Omit multiple calculations of the same thing inside a compiled code?
Toy problem
This question arises from the more complicated question involving it as a part.
Assume a 2D table tab. We need to iterate over its rows ...
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Why is the following code not compilable?
The code below should replace particular elements of some table acccolumns if some condition is satisfied:
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Why are the results of these codes different?
I apologize for the very long question with a relatively complicated code. I am dealing with a real problem, and the question below appeared from my attempt to simplify this problem to ask about it ...
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Memory leak with pure function and in the listable option of compiled function?
I'm using
13.0.0 for Microsoft Windows (64-bit) (December 3, 2021)
When I repeatedly run the command
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How to improve performance of making an Exponentially Weighted Correlation Matrix?
I would like to make an Exponentially Weighted version of Correlation (similar to https://pandas.pydata.org/pandas-docs/version/0.17.0/generated/pandas.ewmcov.html)....
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Memoize a compiled function
Let f be some function, I know that i can memoize a function so that it does not compute again previously calculated values, I can also compile the function to speed up the calculations. But how can I ...
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May the runtime of a code compiled in C depend on the C compiler used?
I have a Windows machine with installed Mathematica. I compile the code in C. The compiler I use is CCompilerDriver`VisualStudioCompiler`VisualStudioCompiler from ...
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Random Seed and Parallelization in Compiled Functions
I am having trouble reproducing a random number from a compiled function with parallelization even with the random seed being set.
Specifically, running the following script should give the same value ...
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Speed up compoundReturn across an array
I am trying to calculate a moving-window of compounded returns on a large 2D-array. (ie some kind of MovingMap on geometric returns)
The Rows are time-steps and the Columns are different financial ...
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Evaluate the function once in the following compiled code, or optimize it?
Consider the following Switch function for two variables:
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A simple question about syntax: how to shorten [email protected]@
Consider the following function:
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How to use Switch for more than one switchable arguments (in a compilable way)?
Consider some example of usage of the function Switch:
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Why is the slowdown of the compiled code evaluation so significant?
Edit
I have reduced the powers of trigonometric functions entering formula1, formula2 to make the problem clearer. It seems that ...
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Compile`GetElement for tensors of rank 1 and 2
Consider some data momvals, mzvals and functions phVal, ...
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Why is the variable inside the compiled code a tensor but not a scalar?
Consider the data data0, data1:
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Why returning the counter takes much time in the following example?
Consider the following data and analytic expressions:
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Why the following formula slows down the compiled code?
I made a routine code CodeComp2 that performs algebraic evaluations using some data TablexgridWithEx, ...
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How to speedup the integration of a tabulated function?
The problem
Consider some pre-generated list with coordinates x1,x2,x3,x4 and values of some function ...
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Speed up Interpolation
I have to calculate a lot of values using interpolation function. I think it could be faster, but I wasn't able to speed it up any way using Compile/Parallel computations. Am I missing something?
<...
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Compiled module error
I have a simple module that I want to compile to potentially speed up.
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How to produce the following table faster?
Question
Consider a toy function func[x1,x2,x3,x4] and a toy grid gridTot of the coordinates ...
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Compiling a function that uses MapThread
I'm looking for tips on quickly applying the following update to $B$ pairs of $(w_i,x_i)$
$$\text{step}(w_i,x_i)=w_i-a x_i \langle w_i, x_i \rangle$$
Below is a readable but very slow version ...
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Argument value loss using Listable C-Compiled Function
In my recent studies, I have come across a very strange anomaly with C compiled functions. When I call a function that has the 'Listable' attribute while global variables are accessed through ...
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How to speedup calling the interpolation function? [duplicate]
Consider the following data:
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Can I efficiently use a compiled function as an input to another compiled function?
I have a compiled function(such as $f\left(z,c\right)=z^2+c$) which will get replaced by different equations as the code runs. I'm using this compiled function(#1) inside another compiled function(#2)....
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Compile a code evaluating a condition only if another condition is positive
Consider the following three tables:
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