Tic toc vs profiler for Arduino

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Martijn Kortenhoeven
评论： Walter Roberson 2020-5-16
Hello everyone,
I am trying to optimize a quadratic program solver for use in realtime on an Arduino for a control process. I have programmed two solvers, let's call them Solver 1 and Solver 2. When I use tic toc, there is almost no difference in computation time, but when I use the profiler, Solver 2 is almost 20 times faster than Solver 1. I read somewhere that the profiler only uses a single thread, while tic toc tends more to real time performance.
My question is: would I notice this significant performance increase when using Solver 2 on an Arduino, or would performance be similar using Solver 1? I am not that familier with an Arduino, and am also unable to test code on an Arduino unfortunately, but I could imagine that an Arduino could only use a single thread. Any insight would be greatly appreciated.
Martijn
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Walter Roberson
Walter Roberson 2020-5-16
If reducing to one thread does not change much then probably they will be close on the arduino.

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回答（1 个）

Walter Roberson
Walter Roberson 2020-5-16
You can get an idea by changing the number of threads to 1
https://www.mathworks.com/help/matlab/ref/maxnumcompthreads.html
Profile is not a good estimation of real time, as profiling disables optimization by the execution engine.
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Martijn Kortenhoeven
Martijn Kortenhoeven 2020-5-16
Thanks for your response! Do you think that would give an accurate representation of using it on an Arduino. I just tried the function you suggested but it does not deliver a major difference compared to tic toc. I also tried the timeit function.

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