Hi,
I have created a function (with multiple embedded functions in the same .m file) that create a GUI to load a picture and add a "user defined" amount of line on it that the user can modify.
I don’t think i can share the full code but on the principle:
once the user has selected the figure, it gets put in an ax
the added curves are then saved as "children of the ax"
there are sliders button with listeners that are linked to those lines, through the list of children of the ax.
when the user select a curve in a drop-down list and move the associate slider, the selected line move on the graph.
the listeners are added in a loop as the code doesn’t know a priori how many lines the user would add.
I was quite proud of this code that was working exactly as intended on R2022b, when I coded it. I skipped entirely R2023 but I now installed R2024a and the code freezes when creating the first series of listeners. it does not issue any error mistake but I just hear my PC working very hard suddenly, with matlab using suddenly up to 20% of the CPU. I saw this thread
https://www.mathworks.com/matlabcentral/answers/287708-some-matlab-versions-crash-when-using-listener
regarding potentially the same issue but it was for R2015.
I tried as well to install R2023b and the code freezes as well. for comparison I use the exact same code with the same figure and the same amount of added line (20) on all three versions. this is what I get
R2022b: lines and listeners added in 6 sec. CPU usage max up to 25%
R2023b: lines and listeners added in >120 sec (I killed the process). CPU usage max up to 16 % at the start, but steady at 12% until I kill the process.
R2024a: lines and listeners added in >120 sec (I killed the process). CPU usage max up to 25 % at the start, but steady at 15% until I kill the process.
I tried as well with lower amount of line (5) and all three version worked. it was very fast for R2022b (<1sec) and took about 5 sec. for R2023b and R2024a.
My code is certainly not optimal. I was learning how to make a GUI while doing it and after the fact I saw how I could have make it better, but since it was working I did not bother…and of course now I don’t really "remember" all that I did back in 2022.

without seeing the code, would you be able to tell me what changed between R2022b and R2023b/R2024a that would make my code that much slowlier? would you have a quick fix?Hi,
I have created a function (with multiple embedded functions in the same .m file) that create a GUI to load a picture and add a "user defined" amount of line on it that the user can modify.
I don’t think i can share the full code but on the principle:
once the user has selected the figure, it gets put in an ax
the added curves are then saved as "children of the ax"
there are sliders button with listeners that are linked to those lines, through the list of children of the ax.
when the user select a curve in a drop-down list and move the associate slider, the selected line move on the graph.
the listeners are added in a loop as the code doesn’t know a priori how many lines the user would add.
I was quite proud of this code that was working exactly as intended on R2022b, when I coded it. I skipped entirely R2023 but I now installed R2024a and the code freezes when creating the first series of listeners. it does not issue any error mistake but I just hear my PC working very hard suddenly, with matlab using suddenly up to 20% of the CPU. I saw this thread
https://www.mathworks.com/matlabcentral/answers/287708-some-matlab-versions-crash-when-using-listener
regarding potentially the same issue but it was for R2015.
I tried as well to install R2023b and the code freezes as well. for comparison I use the exact same code with the same figure and the same amount of added line (20) on all three versions. this is what I get
R2022b: lines and listeners added in 6 sec. CPU usage max up to 25%
R2023b: lines and listeners added in >120 sec (I killed the process). CPU usage max up to 16 % at the start, but steady at 12% until I kill the process.
R2024a: lines and listeners added in >120 sec (I killed the process). CPU usage max up to 25 % at the start, but steady at 15% until I kill the process.
I tried as well with lower amount of line (5) and all three version worked. it was very fast for R2022b (<1sec) and took about 5 sec. for R2023b and R2024a.
My code is certainly not optimal. I was learning how to make a GUI while doing it and after the fact I saw how I could have make it better, but since it was working I did not bother…and of course now I don’t really "remember" all that I did back in 2022.

without seeing the code, would you be able to tell me what changed between R2022b and R2023b/R2024a that would make my code that much slowlier? would you have a quick fix? Hi,
I have created a function (with multiple embedded functions in the same .m file) that create a GUI to load a picture and add a "user defined" amount of line on it that the user can modify.
I don’t think i can share the full code but on the principle:
once the user has selected the figure, it gets put in an ax
the added curves are then saved as "children of the ax"
there are sliders button with listeners that are linked to those lines, through the list of children of the ax.
when the user select a curve in a drop-down list and move the associate slider, the selected line move on the graph.
the listeners are added in a loop as the code doesn’t know a priori how many lines the user would add.
I was quite proud of this code that was working exactly as intended on R2022b, when I coded it. I skipped entirely R2023 but I now installed R2024a and the code freezes when creating the first series of listeners. it does not issue any error mistake but I just hear my PC working very hard suddenly, with matlab using suddenly up to 20% of the CPU. I saw this thread
https://www.mathworks.com/matlabcentral/answers/287708-some-matlab-versions-crash-when-using-listener
regarding potentially the same issue but it was for R2015.
I tried as well to install R2023b and the code freezes as well. for comparison I use the exact same code with the same figure and the same amount of added line (20) on all three versions. this is what I get
R2022b: lines and listeners added in 6 sec. CPU usage max up to 25%
R2023b: lines and listeners added in >120 sec (I killed the process). CPU usage max up to 16 % at the start, but steady at 12% until I kill the process.
R2024a: lines and listeners added in >120 sec (I killed the process). CPU usage max up to 25 % at the start, but steady at 15% until I kill the process.
I tried as well with lower amount of line (5) and all three version worked. it was very fast for R2022b (<1sec) and took about 5 sec. for R2023b and R2024a.
My code is certainly not optimal. I was learning how to make a GUI while doing it and after the fact I saw how I could have make it better, but since it was working I did not bother…and of course now I don’t really "remember" all that I did back in 2022.

without seeing the code, would you be able to tell me what changed between R2022b and R2023b/R2024a that would make my code that much slowlier? would you have a quick fix? freezing code, addlisteners, r2023, r2024 MATLAB Answers — New Questions

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