Cost of having try-catch statements?

Andrew Haley aph@redhat.com
Tue Aug 10 16:37:00 GMT 2004


Martin Egholm Nielsen writes:
 > >  > I was wondering: Is there any significant cost in having "unused" 
 > >  > try-catches in my code?
 > >  > That is, I have a method that 99.99% of the times invoked never throws a 
 > >  > given exception. However, in case it does, I need to log it...
 > > The only cost is the unwinder tables, (which are not read into memory
 > > unless your exception is thrown) and the handler itself, which may
 > > cause some instruction cache presure.
 > So practically no overhead?

That's the idea.  Really, if there is any significant overhead for an
unused handler that would be a bug.

Andrew.



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