time elapsed by a portion of the code

Hello,

I need to know how much time a particular portion of my code consumes. I tried MATLAB profiler. But it displays how much time each function inside the code has taken along with its self time. But I need to define a particular portion or code segment inside my code (say for example a for loop) and need to know time it takes. How can I do it?

I do not want to use tic toc inside my code. I want things to be displayed like MATLAB profiler. It is required for my project. Can it be done?

Thanks in advance :)

-OBLI

Answer 1

[Jan]

Please consider, that profile disables the JIT acceleration, such that lean loops will run significantly slower - a factor of 1000 is possible.

I'm not really sure how useful the profiler is for measuring the run-time, when it has large effects on the run-time. Therefore I use it to measure the memory consumption (not documented) and the calling tree. But the profiler is a good tool to find bottlenecks like the access of harddisks or network resources.

[oblivious]

I need exact run-time. so i am not gonna use profiler anymore. thanks for the info simon

Answer 2

[F.]

If you don't like tic/toc or cputime ...

You can use the profiler in a local part of your code :

   profile on
   for
      ...
   end
   profile off
   p = profile('info');
   save myprofiledata p

And after

   load myprofiledata
   profview(0,p)