# Questions tagged [caching]

For questions related to the effects of Mathematica's internal caching mechanisms.

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1 vote
1 answer
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### Removing notebook cache from ExternalEvaluate

Question While working with Python's ExternalEvaluate the intermediate calculation results with Python are stored in the notebook. (...
• 37.5k
4 votes
0 answers
90 views

### Accelerate the retrieval time for Entity data

I like to use Mathematica to answer questions related to cities such as how many cities in the United States have a population greater than 100,000 and what the distribution of them would look like on ...
• 1,673
3 votes
1 answer
136 views

### Memoization of functions with optional arguments

Consider the following function that generates a sparse diagonal matrix: ...
• 263
2 votes
2 answers
152 views

### How can I use FullSimplify output in function construction without having to re-FullSimplify? (Doubts about my workaround)

I have an expression that I want to use in a function definition. For concreteness let's take Gamma[k + 4]/k!. I know this can be simplified to ...
5 votes
3 answers
310 views

### Forcing NDSolve not to store full solution, in order to save memory

When using NDSolve to integrate a time-varying dynamical system (ie, an initial value problem), I often only care about the final value of the dependent variables ...
• 253
1 vote
1 answer
379 views

### Cache a function in mathematica

I have a function of one variable $f(x): \mathbb{R}\to \mathbb{C}$ which is very difficult to evaluate. Single evaluations may take hours, and I need to use the function at a large variety of points. ...
• 291
7 votes
2 answers
775 views

### Does Mathematica reuse previous computations?

I am doing an analysis of experimental results in which I need to repeat the same GaussianFilter hundred of times on different data. As explained in the ...
• 1,332
6 votes
1 answer
446 views

### Clever caching of a recursively defined function

I've got a function of the form f[n,s] where n is a natural number and s is a finite ...
• 1,874
3 votes
1 answer
131 views

### How to refresh or clear cached CloudObjects[]?

cross posted on community.wolfram.com Let's create an API which creates one file each time it is called/accessed: ...
• 136k
5 votes
2 answers
333 views

### NetModel's cache in which folder?

NetModel will produce a big cache file after you use it first time. ...
• 26.4k
10 votes
1 answer
327 views

### How to clear Integrate internal memory?

I noticed that when I call Integrate for the first time, on an integral that I know will take longer than the time limit I give it, it will abort for the first time,...
• 137k
13 votes
1 answer
479 views

### SquaresR memory leak?

I have tried the following code in Mathematica 11.0.1.0 on my MacBook: ...
• 133
8 votes
2 answers
259 views

### How to save the caching produced in processing

As my this previous post.I get a custom function which can help me got some function contain a certain option.And I have put it in my "init.m" file. ...
• 26.4k
34 votes
2 answers
792 views

### GroupBy twice gives different results

Bug introduced in 7.0 or earlier and persisting through 11.1 It took me quite a lot of time to finally trace down to this strange output. I really don't know why. First, I create a list ...
• 17k
1 vote
0 answers
107 views

### Evaluation of likelihood very slow

I am trying to implement a simple statistical model for the first time in Mathematica. My model is made my one random variable which is the sum of background and signal. Background is an exponential ...
• 111
3 votes
1 answer
221 views

### May I restrict caching to disk when memory runs low? [duplicate]

An hour ago, I had to hard reset my laptop again because Mathematica froze the system again. When import a large file or make a mistake that produces huge arrays with complicated entries etc., I often ...
• 524
1 vote
0 answers
437 views

### Speeding up inversion of symbolic matrices by invoking caching

Is it possible to reduce the computation time taken to find inverse of symbolic matrices USING CACHING TECHNIQUES accessible (if any)? I am trying to compute inverse of symbolic matrices of size ...
• 2,128
4 votes
0 answers
430 views

### Memory problem with producing complex graphics of general type

The problem I am about to ask has appeared once here: Memory Leak in Frontend - anyone know a workaround?. However, in this question I would like to put it in a bit different context. Problem recipe: ...
• 1,652
9 votes
1 answer
420 views

### Caching of Graph Graphics

In this answer, Simon Woods concludes that when you display an expression with head graph more than once, something is getting stored somewhere. I looked into it too and found out this only happens if ...
• 12.2k
17 votes
2 answers
1k views

### Built-in Mathematica data: are they cached? how to speed up the loading?

Mathematica has numerous built-in data for science and math. Every first call to a data function in a new Mathematica session will "re-initialize indices" (download the data). Is there a way to store ...
• 71.9k
11 votes
3 answers
607 views

### Making sure that Timing[] isn't thrown off by caching

In playing with and comparing the various answers to my question here, I tried applying Timing[] to see how fast things ran, but it seemed that some of the answers (...
• 3,169
13 votes
3 answers
446 views

### Memoization of Rounded inputs

Memoization is a technique for improving performance by having a function remember its previous arguments. For example, f[x_]:=f[x]=mySlowFunction[x] will be ...
• 5,051