@Joe Riel   @Anthrazit

After updating an outdated OpenVPN I can again turn on the start page again.

At the same time other applications where running normally appart from the file explorer which took ages to display folder content (the green progressbar did not finish a fast as usual). This is annother indication that the filesystem is somehow involved in the slow opening of the start page

@ianmccr 

Interesting.

Looks like what I experience from time to time when my display is set to 4k and as you said after some time of oparation.

What was die display resolution when you took the screen shot?

Some of the palletes look crisp and others blury. That's what I see only under high resolution on ATI and on NVIDIA

Maybe its worth updating the graphics cards dirver?

@ianmccr That's OK.

Could you share an example: A Maple worksheet with a code edit region and the code pasted.

I can't reproduce what you described.

Question: What happens if you paste in an input line in Math 1D?

Can you attach images in better resolution? I hardly can read the code when zooming in.

The error massage fits to Maple 2020, which had no print[n] but also no negative interface values

Looks to me that the implemented error massage is still the old.

@sursumCorda 

I observe more or less the same pattern than you with the difference that my computer is slower.

At n=15 Maple 2018 terminates with a memory allocation error.

Maple 2023 evaluates for a long time but finishes successfully 

.

@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