Time consumption of string copied to string array
2 visualizaciones (últimos 30 días)
Mostrar comentarios más antiguos
Thomas Cimiega
el 8 de Mayo de 2022
Comentada: Thomas Cimiega
el 9 de Mayo de 2022
I programmed a simulation and currently optimizing the function in terms of time. Therefore I use the profiler to check the time consumption per function. Here I was wondering, why a simple copy instruction of a string into a string array - that is indeed often called - takes nearly 10% of simulation time:
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/991250/image.png)
in line 65 you can see the instruction. ‘obj.dataList’ is a string-array, ‘pos’ a logical array with equal size of ‘obj.dataList’ and only a single true value and ‘value’ a string. I do not know what exactly happens "inside" of Matlab; since I am using strings, there has to be some kind of repeating memory allocation which of course takes time. But that this single line takes 10% of simulation time, seems a bit long.
Does anyone have an idea, how I can optimize that?
0 comentarios
Respuesta aceptada
Matt J
el 8 de Mayo de 2022
pos a scalar between 1 and the length of obj.dataList and value a string.
That is definitely not the case. In the preceding line, you can see that pos is the result of a logical operation, and therefore is an array consisting of logical zeros and ones.
5 comentarios
Más respuestas (0)
Ver también
Categorías
Más información sobre Logical en Help Center y File Exchange.
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!