Level 1 s-function much faster than level 2 s-function

2 views (last 30 days)
I have this issue where my level 1 s-function is much faster than my level 2 s-function (where they both have equivalent behavior). The level 2 s-function is about an order of magnitude slower than the level 1 function as reported in the Simulink profiler. I'm not sure what is exactly causing the issue.
I've also found these threads [1] [2], where another person reports a similar issue. However, disabling direct feedthrough on the input port doesn't solve the issue. Moreover, I would like to keep direct feedthrough enabled (and it is also enabled for the level 1 s-function).
I have attached an example level 1 and level 2 s-function, which implement a simple state-space system, for which I also encounter the same issue.
edit:
I discovered that even for the example Mathworks gives, https://nl.mathworks.com/help/simulink/sfg/maintaining-level-1-matlab-s-functions.html#bq3i98j, for converting a level 1 s-function to a level 2 s-function (with sfundsc2.m and sfundsc2_level2.m), the level 2 s-function is significantly slower, at least on my system (see the screenshot).
Are level 2 s-functions just inherently slower, or is there a way to make the excecution time comparible to level 1 s-functions?

Answers (0)

Categories

Find more on Simulink in Help Center and File Exchange

Products


Release

R2020a

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!