How is a try catch block evaluated?

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Hi, I wonder how a try-catch block is evaluated in matlab. In particular, is the try-catch block evaluated in runtime or compile time?
Also, is a try-catch block expensive?
If someone have a link to any documentation that would be much appreciated.
(Btw, I know that try-catch is not the best solution in most cases. Still I would like to know how it works, since I have used it in some code).

Accepted Answer

Sean de Wolski
Sean de Wolski on 22 Aug 2014
My understanding is that the JIT does work with try/catch and that they do not affect performance as long as no exceptions are thrown. As soon as an exception is thrown, MATLAB deals with handling the exception, where performance is not as critical.

More Answers (1)

Adam
Adam on 22 Aug 2014
It is evaluated at runtime. There is no compilation in Matlab so most things are done at runtime (excluding Mex compilation and similar).
I may be misunderstanding the question though. Even in C++ it is evaluated at runtime, because you don't know at compile time if something will throw an exception. If it would always throw an exception known at compile time then I'd imagine that's some bad coding design.
  2 Comments
Adam
Adam on 22 Aug 2014
Yes, true, I was rolling in the JIT compilation with runtime activity, but should have said there is no pre-compilation.

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