@sursumCorda 

Besdies using optimized library code (which might not be avaialble on all operating system Maple supports) cache size and memory allocation could play a role when FFT performance decreases. On my machine the processor cache

(from the task manager performance tab)

is in the order of magnitude of the arrays where you notice a "sudden" increase of processing time. It could be that your Phyton code uses better hardware support and/or less memory.

If you provide executable test code, other users here could test for a sudden performance decrease on their machines with different chache size

time without real, Clock commands and/or the Time command might give a better understanding if I/O to the system memory slows down computation.

Reading Fourier Transforms in Maple tells me that there has been some effort to optimize FFT. Signals/Images 2^14x2^14 would be larger than 100 MPx. I don't think Maplesoft has specified, optimized and tested that far. Its hard to find real valued 16k image content in high resolution. This might be something for the future.

A reason why this old code has not been optimized could be the signal processing library which has been introduced with Maple 2017:

help(SignalProcessing,FFT)

Could this be an alterantive?

I think I got the code snippet and the 20y wrong.

Which version do you use?

@Fereydoon_Shekofte 

You're welcome! I'm glad to hear you found it interesting. I hope to find some time for more fun stuff.

@Joe Riel 

on a different Windows 10 PC after system restart:

• After 5 minutes of waiting I started Maple 2022 and Maple 2021 which also tried to open the start page.
• After 10 minutes I killer all Maple instaces
• Starting Maple 2023: the same issue. I left to grab something to eat. When I came back after 25 min the start was opend.
• I disabled the start page and enabled it again. Now it seems to start normally. I will keep an eye on it on this machine as well.

@Carl Love 

Only for information:

I read that it might be realated to the graphic card help(plot3d,gldriver). Since my oberservation were on ATI I tested it the same input on NVIDA under 4k.

Its not so tiny but still too small IMO.

@delvin 

That's a new question.

Are you aware that you are trying to plot a univariate, complex valued function as a surface plot?

For a surfaceplot you need a bivariate real valued function.

I have stopped using Matlab a long time ago and, as I have said above, I do not have an installtion running. I am afraid I can't help you any further. Maybe this community can

https://stackoverflow.com/questions/tagged/matlab

@Joe Riel 

I restored the start page and restarted. Starts fine for the moment. I will leave the start page on and post here when it happens again.

Before further investigation: Could you have a look if Maple 2023 output meets your expectations?

Download Temperature_Object_Use_2023.mw

@delvin 

You can plot less lines (see linespace in the code above) or make the lines thinner (surface properties).

For that, have a look at the online documentation:

https://de.mathworks.com/help/matlab/ref/surf.html

https://de.mathworks.com/help/matlab/ref/matlab.graphics.chart.primitive.surface-properties.html

@acer Thank you.

It's a bit confusing that the complete integral of the first kind got its own symbol but not the complete integral of the second kind.

It seems that it is widely used in this way.

What do you mean by guiding?

What do you mean by "3D chart"? `Do you mean the output of plot3d?

@ecterrab 

 Selecting with the mouse and scrolling takes too long, but this way it works acceptably and(!!!) preserves the output:

S1: place the cursor where to stop

S2: Select all the above with Crtl+Shift+Home (on Windows)

S3: from the menu: Evaluate -> Selection

Thank you

Before I read your post I was quite happy with what I saw on the screen.

Now I see these "absurdly" long negations everywhere. Here a sample from a text passage

I clearly am in favour of a shorter version.

@Carl Love 

That's a good workaround!

Since 2d is not affected by tiny rendering (below: left 4k right 2k) and the rendering changes without Maples GUI and kernel dooing anything, I think that the issue is more openGL related.