MATLAB Profiler - Granularity of Information

MATLAB Profiler produces very coarse granularity of performance statistics on a model I'm developing and testing:

• # of times a routine is called;
• Total Time, and Self Time.

However no information is provided on other routines, including MATLAB primitives, called. Can this finer grained information be obtained from Profiler?

[Walter Roberson]

Are you certain that you want an exact count on the number of times that subsref is called for each data type, or the number of times that toolbox/matlab/ops/@double/plus is called due to arithmetic operations ?

[Evans Harrigan]

Yes. While we assume the largest % of the total computational burden will be due to routines our time writes, those routines will most likely call MATLAB primitives. The % of time spent in a custom routine relative to time spent in MATLAB primitive or a referenced custom routine will determine whether performance optimization is warranted, i.e., return on investment (ROI). Since our application is event-driven and mission critical, application is critical to success.

Evans Harrigan

Technical Consultant to the Boeing Company

[Evans Harrigan]

Correction of typos: "routines our team, instead of time;" "application performance is, instead of application is."

Evans Harrigan

Consultant to the Boeing Company

[per isakson]

Are you aware of Undocumented Matlab and profile_history - display graphical profiling timeline data by Yair Altman, Display profiling data as an interactive timeline graph

[Evans Harrigan]

Yes, I'm aware of Altman's book and plan to purchase it as a reference. The graphical feature should be useful. However, access to the data from which the graphs are produced is also of interest to our team. Thanks for this reference.

Evans

[per isakson]

There are four technical articles on Undocumented profiler options on Altman's web-site. And he mostly provides good answers to specific questions in the comment sections.

Answer 1

[Yair Altman]

Use the [undocumented] -detail builtin profiler option, as in: profile on -detail builtin

This works on old Matlab releases as well as new ones.

http://undocumentedmatlab.com/articles/undocumented-profiler-options-part-4

http://undocumentedmatlab.com/articles/tag/profiler

Answer 2

[Sean de Wolski]

This got better in R2020a with the new interface to the profiler.

[Evans Harrigan]

We are planning to upgrade to this version, imminently.